1973 GMC Flowmaster Parts
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- 40 Series™ Muffler
- 2.5 in. Offset Inlet/Opposite Side Offset Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
- 40 Series™ Muffler; 2.5 in. Offset Inlet/Opposite Side Offset Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel;
- 40 Series(TM) Muffler
- Product Attributes:
- Tip Quantity: 0
- Muffler Type: Reflection
- Outlet Position: Offset
- Inlet Diameter: 2.500 In.
- Sound Level: Aggressive
- WARNING CA Proposition 65: Yes
- Fitment: Universal
- Body Width: 9.750 In.
- Inlet Type: Single Offset
- Body Length: 13.000 In.
- Inlet Outside Diameter: 2.500 In.
- Inlet Connection Type: Pipe
- Outlet Diameter: 2.500 In.
- Mount Type: Uses New Hangers (not Included)
- Automotive Item Grade: High Performance
- California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
- Outlet Connection Type: Pipe
- California Proposition 65 Chemical Name 1: Nickel (metallic)
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
- Muffler Series: 40 Series
- Overall Length: 19.000 In.
- Inlet Inside Diameter: 2.500 In.
- Outlet Outside Diameter: 2.500 In.
- Main Piping Diameter: Oem
- Shape: Oval
- Inlet Position: Offset
- Outlet Type: Single Offset Outlet
-
Features:
- 410 Stainless Steel
- Limited Lifetime Warranty
- Aggressive And Powerful Exterior Exhaust Tone
- Notable Interior Resonance
- Excellent Street/Strip And Off Road Application
- No Internal Packing To Blowout
- The Original Two Chamber Design
- Premium Flowmaster Quality
- The Original 40 series muffler delivers an aggressive exterior and interior tone. If youre looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1973 - GMC Jimmy | V | 5031 | 8 Cyl 5.0L | 307 |
- 40 Series™ Muffler
- 2.25 in. Offset Inlet/Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
- 40 Series™ Muffler; 2.25 in. Offset Inlet/Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel;
- 40 Series(TM) Muffler
- Product Attributes:
- Tip Quantity: 0
- Muffler Type: Reflection
- Outlet Position: Offset
- Inlet Diameter: 2.250 In.
- Sound Level: Aggressive
- WARNING CA Proposition 65: No
- Fitment: Universal
- Body Width: 9.750 In.
- Inlet Type: Single Offset
- Body Length: 13.000 In.
- Inlet Outside Diameter: 2.250 In.
- Inlet Connection Type: Pipe
- Outlet Diameter: 2.500 In.
- Mount Type: Uses New Hangers (not Included)
- Automotive Item Grade: High Performance
- Outlet Connection Type: Pipe
- Muffler Series: 40 Series
- Overall Length: 19.000 In.
- Inlet Inside Diameter: 2.250 In.
- Outlet Outside Diameter: 2.250 In.
- Main Piping Diameter: Oem
- Shape: Oval
- Inlet Position: Offset
- Outlet Type: Single Offset Outlet
-
Features:
- Durable Fully Welded 16ga Aluminized Steel
- Aggressive And Powerful Exterior Exhaust Tone
- Notable Interior Resonance
- Excellent Street/Strip And Off Road Application
- No Internal Packing To Blowout
- The Original Two Chamber Design
- Premium Flowmaster Quality
- The Original 40 series muffler delivers an aggressive exterior and interior tone. If youre looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1973 - GMC C15/C1500 Suburban | V | - | 8 Cyl 7.4L | 454 |
- 2.25 in. Offset Inlet/Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
- 40 Series™ Muffler; 2.25 in. Offset Inlet/Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel;
- 40 Series™ Muffler
- Product Attributes:
- Tip Quantity: 0
- Muffler Type: Reflection
- Outlet Position: Offset
- Inlet Diameter: 2.250 In.
- Sound Level: Aggressive
- WARNING CA Proposition 65: No
- Fitment: Universal
- Body Width: 9.750 In.
- Inlet Type: Single Offset
- Body Length: 13.000 In.
- Inlet Outside Diameter: 2.250 In.
- Inlet Connection Type: Pipe
- Outlet Diameter: 2.500 In.
- Mount Type: Uses New Hangers (not Included)
- Automotive Item Grade: High Performance
- Outlet Connection Type: Pipe
- Muffler Series: 40 Series
- Overall Length: 19.000 In.
- Inlet Inside Diameter: 2.250 In.
- Outlet Outside Diameter: 2.250 In.
- Main Piping Diameter: Oem
- Shape: Oval
- Inlet Position: Offset
- Outlet Type: Single Offset Outlet
-
Features:
- Durable Fully Welded 16ga Aluminized Steel
- Aggressive And Powerful Exterior Exhaust Tone
- Notable Interior Resonance
- Excellent Street/Strip And Off Road Application
- No Internal Packing To Blowout
- The Original Two Chamber Design
- Premium Flowmaster Quality
- The Original 40 series muffler delivers an aggressive exterior and interior tone. If youre looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1973 - GMC K15/K1500 Suburban | L | 4097 | 6 Cyl 4.1L | 250 |
- Single Side Exit; 2.5 in. Diameter Sold In Pairs; Hardware/Hangers Are Required For Installation; Offset Inlet/Center Outlet Mufflers Required
- Tailpipe Set; Single Side Exit; 2.5 in. Diameter Sold In Pairs; Hardware/Hangers Are Required For Installation; Offset Inlet/Center Outlet Mufflers Required;
- Tailpipe Set
- Product Attributes:
- Tubing Diameter: 2.500 In.
- Automotive Item Grade: High Performance
- Exhaust Pipe Wall Max Gauge: 16
- Exit Position: Single Side
- Inlet Diameter: 2.500 In.
- System Type: Tailpipe
- WARNING CA Proposition 65: No
- Fitment: Direct Oe Replacement
- Overall Length: 65.250 In.
- Outlet Diameter: 2.500 In.
-
Features:
- Mandrel Bent 16 Gauge Aluminized Tubing
- Exits At Rear Of Vehicle
- 3 Year Limited Warranty
- Premium Flowmaster Quality
- Gray Color
- These Builder Series tailpipes are constructed from 2.50-inch mandrel-bent 16-gauge aluminized steel tubing for maximum flow, tuck up high in the chassis for good clearance and exit out the sides behind the rear wheels. Designed to be used with Side Inlet/Center Outlet mufflers such as part# 942546 (Super 44 Series) or 53056 (Super 50 Series) mufflers. Covered by our 3-year Limited Warranty. Note: Not designed to fit in factory bumper exhaust cutouts. Some fitment may be necessary. Does Not include installation hardware or exhaust tips.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle |
|---|
| 1973 - GMC C25/C2500 Pickup |
- 3 in. Center In/2.5 in. Dual Out; Clamp On; 409 Stainless Steel Not Direct Fit-Some Adaptation Required
- FlowFX Muffler; 3 in. Center In/2.5 in. Dual Out; Clamp On; 409 Stainless Steel;
- FlowFX Muffler
- Product Attributes:
- Muffler Outlet Diameter: 2.500 In.
- Tip Quantity: 0
- Muffler Overall Length: 20.000 In.
- Muffler Type: Absorption
- California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
- Outlet Connection Type: Clamp-on
- California Proposition 65 Chemical Name 1: Nickel (metallic)
- Outlet Position: Dual Outlet
- Sound Level: Moderate
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
- Muffler Body Width: 9.000 In.
- Muffler Series: Flow Fx
- Overall Length: 20.000 In.
- Muffler Body Length: 14.000 In.
- Outlet Quantity: 1
- Shape: Oval
- Inlet Quantity: 1
- Muffler Body Shape: Oval
- Inlet Position: Center
- Body Length: 14.000 In.
- Inlet Connection Type: Clamp-on
- Outlet Type: Dual Outlet
-
Features:
- Not A Direct Fit
- Moderate Sound
- Straight Through Style
- Fully Welded Steel Case
- Flowmasters FlowFX series mufflers deliver a moderate performance tone for the enthusiast looking for an exhaust note that is different from the chambered muffler sound. The interior features a large 3.00-inch straight-through stainless steel perforated core, surrounded with high-temperature sound absorption materials delivering a deep traditional mellow tone. The internal flow design is reversible, so the muffler can be installed in either direction to best suit the vehicle application and offsets needed. Features include fully MIG-welded bright 409 stainless steel construction with the FlowFX logo embossed on both sides of the case. The FlowFX line of mufflers is perfect for the person looking for a show quality performance muffler at an economical price point and in a compact sized case.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1973 - GMC Jimmy | V | 5031 | 8 Cyl 5.0L | 307 |
- 2.5 in. Offset Inlet/Opposite Side Offset Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
- 40 Series™ Muffler; 2.5 in. Offset Inlet/Opposite Side Offset Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel;
- 40 Series™ Muffler
- Product Attributes:
- Tip Quantity: 0
- Muffler Type: Reflection
- Outlet Position: Offset
- Inlet Diameter: 2.500 In.
- Sound Level: Aggressive
- WARNING CA Proposition 65: Yes
- Fitment: Universal
- Body Width: 9.750 In.
- Inlet Type: Single Offset
- Body Length: 13.000 In.
- Inlet Outside Diameter: 2.500 In.
- Inlet Connection Type: Pipe
- Outlet Diameter: 2.500 In.
- Mount Type: Uses New Hangers (not Included)
- Automotive Item Grade: High Performance
- California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
- Outlet Connection Type: Pipe
- California Proposition 65 Chemical Name 1: Nickel (metallic)
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
- Muffler Series: 40 Series
- Overall Length: 19.000 In.
- Inlet Inside Diameter: 2.500 In.
- Outlet Outside Diameter: 2.500 In.
- Main Piping Diameter: Oem
- Shape: Oval
- Inlet Position: Offset
- Outlet Type: Single Offset Outlet
-
Features:
- 410 Stainless Steel
- Limited Lifetime Warranty
- Aggressive And Powerful Exterior Exhaust Tone
- Notable Interior Resonance
- Excellent Street/Strip And Off Road Application
- No Internal Packing To Blowout
- The Original Two Chamber Design
- Premium Flowmaster Quality
- The Original 40 series muffler delivers an aggressive exterior and interior tone. If youre looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1973 - GMC Jimmy | V | 5031 | 8 Cyl 5.0L | 307 |
- 2.5 Offset In/2.5 Offset Out; Clamp On; 409 Stainless Steel Not Direct Fit-Some Adaptation Required
- FlowFX Muffler; 2.5 Offset In/2.5 Offset Out; Clamp On; 409 Stainless Steel;
- FlowFX Muffler
- Product Attributes:
- Tip Quantity: 0
- Muffler Overall Length: 20.000 In.
- Muffler Type: Absorption
- Outlet Position: Offset (opposite)
- Sound Level: Moderate
- WARNING CA Proposition 65: Yes
- Muffler Body Length: 14.000 In.
- Outlet Quantity: 1
- Body Length: 14.000 In.
- Inlet Outside Diameter: 2.500 In.
- Inlet Connection Type: Clamp-on
- Muffler Outlet Diameter: 2.500 In.
- California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
- Outlet Connection Type: Clamp-on
- California Proposition 65 Chemical Name 1: Nickel (metallic)
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
- Muffler Body Width: 9.000 In.
- Muffler Series: Flow Fx
- Overall Length: 20.000 In.
- Inlet Inside Diameter: 2.500 In.
- Muffler Inlet Diameter: 2.500 In.
- Main Piping Diameter: 2.500 In.
- Shape: Oval
- Inlet Quantity: 1
- Muffler Body Shape: Oval
- Inlet Position: Offset
- Outlet Type: Single Outlet
-
Features:
- Not A Direct Fit
- Moderate Sound
- Straight Through Style
- Fully Welded Steel Case
- Flowmasters FlowFX series mufflers deliver a moderate performance tone for the enthusiast looking for an exhaust note that is different from the chambered muffler sound. The interior features a large 3.00-inch straight-through stainless steel perforated core, surrounded with high-temperature sound absorption materials delivering a deep traditional mellow tone. The internal flow design is reversible, so the muffler can be installed in either direction to best suit the vehicle application and offsets needed. Features include fully MIG-welded bright 409 stainless steel construction with the FlowFX logo embossed on both sides of the case. The FlowFX line of mufflers is perfect for the person looking for a show quality performance muffler at an economical price point and in a compact sized case.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1973 - GMC Jimmy | V | 5031 | 8 Cyl 5.0L | 307 |
- Dual; Dual Rear Same Side Exit; Includes 2.5 in. Tubing/Super 44 Series(TM) Mufflers/H-Pipe/Hdw; Tips Not Included; Aluminized Steel;Intended For Race Use Only
- American Thunder Header Back Exhaust System; Dual; Dual Rear Same Side Exit; Includes 2.5 in. Tubing/Super 44 Series™ Mufflers/H-Pipe/Hdw; Tips Not Included; Aluminized Steel;
- American Thunder Header Back Exhaust System
- Product Attributes:
- Tubing Diameter: 2.500 In.
- Tubing Material: Aluminized Steel
- Exhaust Type: Dual
- Mount Type: Flanged
- Muffler Type: Welded Baffle
- Inlet Diameter: 2.500 In.
- Sound Level: Moderate/aggressive
- WARNING CA Proposition 65: No
- Exhaust Series: American Thunder
- Exit Style: Straight
- Muffler Series: Super 44
- Inlet Inside Diameter: 2.500 In.
- Outlet Outside Diameter: 2.500 In.
- Tail Pipe Diameter: 2.500 In.
- Shape: Oval
- Exit Position: Dual Rear Same Side
- Tip Diameter: N/a
- Muffler Count: 2
- Single or Dual: Dual
- System Type: Header Back
- Outlet Diameter: 2.500 In.
-
Features:
- Limited Lifetime Warranty
- Moderate Exterior Exhaust Tone
- Includes Hangers and Hardware For Easy Installation
- Header Back System
- Dual Out Rear Exit
- Dyno Tuned for Maximum Performance
- Premium Flowmaster Quality
- Famous Flowmaster sound
- Multiple Exit Options
- Patented Delta Flow Technology
- Made in the USA
- This American Thunder exhaust system was specially designed for 1973-1974 Chevrolet and GMC C10 and C15 1/2 ton and 3/4 ton 2wd trucks and is perfect for the person looking for moderate to aggressive interior and exterior sound levels. The crossmember-back exhaust system comes complete with a built-in H-pipe crossover, all mandrel-bent 2.50-inch aluminized steel tubing, a pair of Super 44 Series performance mufflers and your choice of tailpipe exits. Either dual out rear under the bumper for a muscular look or dual out the sides behind the rear tires for that classic truck look. The system includes all hardware necessary for installation and is designed to accommodate both long and short wheelbases, with either an automatic or manual transmission and provides adequate clearance for substantially lowered vehicles. The exhaust system is covered by our 3-year Limited Warranty. Notes: Does Not include exhaust tips, header reducer cones or downpipes for factory manifolds.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | Bed Length | Body | CID |
|---|---|---|---|---|---|---|
| 1973 - GMC C25/C2500 Pickup | L | 4098 | 6 Cyl 4.1L | 96.0 | Crew Cab Pickup | 250 |
- 40 Series™ Delta Flow Muffler
- 2.5 in. Offset Inlet/2.5 in. Opposite Side Offset Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
- 40 Series™ Delta Flow Muffler; 2.5 in. Offset Inlet/2.5 in. Opposite Side Offset Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel;
- 40 Series(TM) Delta Flow Muffler
- Product Attributes:
- Tip Quantity: 0
- Muffler Type: Reflection
- Outlet Position: Offset
- Inlet Diameter: 2.500 In.
- Sound Level: Aggressive
- WARNING CA Proposition 65: No
- Fitment: Universal
- Body Width: 9.750 In.
- Inlet Type: Single Offset
- Body Length: 13.000 In.
- Inlet Outside Diameter: 2.500 In.
- Inlet Connection Type: Pipe
- Outlet Diameter: 2.500 In.
- Mount Type: Uses New Hangers (not Included)
- Automotive Item Grade: High Performance
- Outlet Connection Type: Pipe
- Muffler Series: 40 Series Delta Flow
- Overall Length: 19.000 In.
- Inlet Inside Diameter: 2.500 In.
- Outlet Outside Diameter: 2.500 In.
- Main Piping Diameter: 2.500 In.
- Shape: Oval
- Inlet Position: Offset
- Outlet Type: Single Offset Outlet
-
Features:
- Durable Fully Welded 16ga Aluminized Steel
- Race Proven Patented Delta Flow® Technology
- Excellent Street/Strip And Off Road Application
- No Internal Packing To Blow Out
- This two chamber design incorporates Flowmasters Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over standard 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1973 - GMC Jimmy | V | 5031 | 8 Cyl 5.0L | 307 |
- 2.5 in. Offset Inlet/2.5 in. Opposite Side Offset Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
- 40 Series™ Delta Flow Muffler; 2.5 in. Offset Inlet/2.5 in. Opposite Side Offset Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel;
- 40 Series™ Delta Flow Muffler
- Product Attributes:
- Tip Quantity: 0
- Muffler Type: Reflection
- Outlet Position: Offset
- Inlet Diameter: 2.500 In.
- Sound Level: Aggressive
- WARNING CA Proposition 65: No
- Fitment: Universal
- Body Width: 9.750 In.
- Inlet Type: Single Offset
- Body Length: 13.000 In.
- Inlet Outside Diameter: 2.500 In.
- Inlet Connection Type: Pipe
- Outlet Diameter: 2.500 In.
- Mount Type: Uses New Hangers (not Included)
- Automotive Item Grade: High Performance
- Outlet Connection Type: Pipe
- Muffler Series: 40 Series Delta Flow
- Overall Length: 19.000 In.
- Inlet Inside Diameter: 2.500 In.
- Outlet Outside Diameter: 2.500 In.
- Main Piping Diameter: 2.500 In.
- Shape: Oval
- Inlet Position: Offset
- Outlet Type: Single Offset Outlet
-
Features:
- Durable Fully Welded 16ga Aluminized Steel
- Race Proven Patented Delta Flow® Technology
- Excellent Street/Strip And Off Road Application
- No Internal Packing To Blow Out
- This two chamber design incorporates Flowmasters Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over standard 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1973 - GMC Jimmy | V | 5031 | 8 Cyl 5.0L | 307 |
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