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- Multiple Exit Options
- Street Series Stainless Crossmember-Back System
- Street Series Stainless Crossmember-Back System
- Product Attributes:
- Muffler Type: Straight-through
- Tip Finish: Polished
- Exit Style: Multiple Exit Options
- Tip Length: 9
- Tip Type: Welded;single Wall;turndown;cut Edge
- Muffler Quantity: 2
- Subtitle: Crossmember-back
- Main Piping Diameter: 2.5
- Tip Diameter: 2.75
- Muffler Finish: Satin
- Tip Shape: Round
- Inlet Connection Type: Weld-on
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1970 - Buick GS 455 | V | 7456 | 8 Cyl 7.5L | 455 |
- Dual; Dual Rear Exit; Includes 2.5 in. Tubing/X-Member Back/H-Pipe/Hardware/Super 40 Series(TM) Mufflers;Legal On Non-Emissions Controlled Vehicles Or For Race Use
- American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Includes 2.5 in. Tubing/X-Member Back/H-Pipe/Hardware/Super 40 Series™ Mufflers;
- American Thunder Header Back Exhaust System
- Product Attributes:
- Tip Quantity: 0
- Tubing Diameter: 2.500 In.
- Exhaust Type: Dual
- Inlet Diameter: 2.500 In.
- Sound Level: Moderate/aggressive
- WARNING CA Proposition 65: No
- Exhaust Series: American Thunder
- Heat Shield Attached: No
- Exit Style: Straight
- Muffler Series: Super 40 Series
- Inlet Inside Diameter: N/a
- Outlet Outside Diameter: 2.500 In.
- Tail Pipe Diameter: 2.500 In.
- Exit Position: Dual Rear
- Tip Diameter: N/a
- Muffler Count: 2
- Single or Dual: Dual
- System Type: Header Back
- Muffler Part Number: 952548
- Outlet Diameter: 2.500 In.
-
Features:
- Mandrel Bent 16 Gauge Aluminized Tubing
- Moderate to Aggressive Exterior Exhaust Tone
- Includes Hangers And Hardware For Easy Installation
- Connects After Factory Catalytic Converter
- Premium Flowmaster Quality
- Made in the USA
- 3 Year Limited Warranty
- This American Thunder crossmember-back exhaust system is custom designed for most 1964-1972 GM A-body cars and is for the person looking for a complete 2.50-inch dual exhaust system with a moderately aggressive exterior tone and a moderate interior sound. With easy fit in mind, these aluminized steel systems feature all mandrel-bent tubing, an H-pipe to equalize the exhaust pressures for maximum performance and deep sound and includes a pair of specially selected Super 40 mufflers. The mandrel-bent 2.50-inch tailpipes tuck up out of the way for maximum clearance and offer you two choices of tailpipe exit styles. Like all Flowmaster systems, benefits include improved throttle response, power, and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for an easy installation and is covered by our 3-year Limited Warranty.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1970 - Buick GS 455 | V | 7456 | 8 Cyl 7.5L | 455 |
- Dual; Dual Rear Exit; Includes 2.5 in. Tubing From Transmission X-Member Back/H-Pipe/Hardware; Requires Offset/Offset Mufflers;Legal On Non-Emissions Controlled Vehicles Or For Race Use Muffler Must Be Purchased Separately~Use Offset Inlet/Offset Outlet Mufflers Only
- Header-Back Pipe Kit; Dual; Dual Rear Exit; Includes 2.5 in. Tubing From Transmission X-Member Back/H-Pipe/Hardware; Requires Offset/Offset Mufflers;
- Header-Back Pipe Kit
- Product Attributes:
- Tip Quantity: 0
- Tubing Diameter: 2.500 In.
- Exhaust Type: Dual
- WARNING CA Proposition 65: No
- Exhaust Series: Pipes Only
- Heat Shield Attached: No
- Exit Style: Straight
- Inlet Inside Diameter: 2.500 In.
- Outlet Outside Diameter: 2.500 In.
- Tail Pipe Diameter: 2.500 In.
- Exit Position: Dual Rear
- Tip Diameter: N/a
- Single or Dual: Dual
- System Type: Pipe
- Muffler Part Number: Not Included
-
Features:
- 2.5 in. Tubing Only
- No Mufflers In Pipe Kit
- Transmission Cross-Member Back
- Dual Out Rear Exit
- Premium Flowmaster Quality
- 3 Year Limited Warranty
- This mandrel-bent crossmember-back exhaust system is custom designed for most 1964-1972 GM A-body cars and is perfect for the person looking for true dual exhaust system. This system comes complete minus the mufflers and allows you to choose the sound level of the Flowmaster performance mufflers you desire for your vehicle. System features include all mandrel-bent 2.50-inch aluminized steel tubing, an H-pipe to equalize the exhaust gas pressures and sound for maximum performance and maximum clearance and includes two styles of tailpipe exits. Designed for an easy fit, these systems include all necessary parts, hardware, and instructions for an easy installation. Covered by our 3-year Limited Warranty. Notes: Requires 2.50-inch Offset Inlet/Opposite side Offset Outlet such as part# 942548 (Super 44 Series) or 52558 (50 Series) mufflers.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1970 - Buick GS 455 | V | 7456 | 8 Cyl 7.5L | 455 |
- Dual; Dual Rear Exit; Includes 2.5 in. Tubing/Super 40 Series(TM) Mufflers/H-Pipe/Hardware; 409 Stainless Steel;Legal On Non-Emissions Controlled Vehicles Or For Race Use
- American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Includes 2.5 in. Tubing/Super 40 Series™ Mufflers/H-Pipe/Hardware; 409 Stainless Steel;
- American Thunder Header Back Exhaust System
- Product Attributes:
- Tip Quantity: 0
- Tubing Diameter: 2.500 In.
- Exhaust Type: Dual
- California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
- California Proposition 65 Chemical Name 1: Nickel (metallic)
- Inlet Diameter: 2.500 In.
- Sound Level: Aggressive
- WARNING CA Proposition 65: Yes
- Exhaust Series: American Thunder
- Heat Shield Attached: No
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
- Exit Style: Straight
- Muffler Series: Super 40 Series
- Inlet Inside Diameter: N/a
- Outlet Outside Diameter: 2.500 In.
- Tail Pipe Diameter: 2.500 In.
- Exit Position: Dual Rear
- Tip Diameter: N/a
- Muffler Count: 2
- Single or Dual: Dual
- System Type: Header Back
- Muffler Part Number: Kit Only
- Outlet Diameter: 2.500 In.
-
Features:
- Mandrel Bent 16ga 409S Stainless Tubing
- Limited Lifetime Warranty
- Aggressive And Powerful 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
- This American Thunder exhaust system comes as a complete true dual crossmember-back exhaust for your 1968-1972 GM A-body with a V8 engine. These dual exhaust systems feature 2.50-inch mandrel-bent stainless steel tubing for maximum performance, includes a built-in H-pipe/balance tube flowing into a pair of large case Super 40 mufflers that deliver an aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The 2.50-inch tailpipes exit at a slight angle down under the rear bumper for a strong muscular look. The system includes all hangers and necessary hardware for installation. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage and is covered by our Lifetime Limited Warranty.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
This Part Fits the Following OEM/Substitute Numbers:
15894, 17119, 913250
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1970 - Buick GS 455 | V | 7456 | 8 Cyl 7.5L | 455 |
- Dual Split Rear Behind Rear Tires Exit
- Street Series Stainless Crossmember-Back System
- Street Series Stainless Crossmember-Back System
- Product Attributes:
- Main Piping Diameter: 3
- Muffler Type: Straight-through
- Muffler Finish: Satin
- Exit Style: Dual Split Rear Behind Rear Tires
- Muffler Quantity: 2
- Inlet Connection Type: Weld-on
- Subtitle: Crossmember-back
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1970 - Buick GS 455 | V | 7456 | 8 Cyl 7.5L | 455 |
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