Buick Gran Sport Exhaust System

FLOWMASTER AMERICAN THUNDER HEADER-BACK EXHAUST SYSTEM, ALUMINIZED STEEL -- 2.5 in. tailpipe diameter; Dual rear exit exhaust system; Two mufflers with single inlet and outlet configuration each; Includes installation hardware, gaskets, H-pipe, and Super 40 Series mufflers; Benefits include reduced backpressure for improved acceleration and towing power, cooler under hood temperatures, cleaner and more efficient burn in the combustion chambers, and better fuel economy; Features mandrel-bent 16-gauge aluminized steel tubing; Delivers lesser interior resonance; Increases horsepower and torque; Welding all slip-fit connections recommended; With Flowmaster's limited 3-year warranty.

Fits the following 1965-1967 Buick Gran Sport submodels:

• 1965-1967: Base; All Engines;

FLOWMASTER AMERICAN THUNDER HEADER-BACK EXHAUST SYSTEM, ALUMINIZED STEEL, MUFFLERS SOLD SEPARATELY -- Tubing Pipes Only, Dual Pipes Out The Rear Exit (DOR), Benefits Include Reduced Backpressure For Improved Acceleration And Towing Power, Cooler Underhood Temperatures, Cleaner And More Efficient Burn In The Combustion Chambers, And Better Fuel Economy, Features Mandrel Bent 16 Gauge Aluminized Steel Tubing, Delivers Lesser Sound Volume, Comes With 2.5" Tubing From Transmission X-Member Back, H-Pipe, And Hardware, Requires You To Purchase 2.5" In/Out-Offset/Offset Mufflers Such As Flowmaster #952548, Welding All Slip-Fit Connections Is Strongly Recommended, With Flowmaster's Limited Warranty

Fits the following 1965-1967 Buick Gran Sport submodels:

• 1965-1967: Base; All Engines;

FLOWMASTER AMERICAN THUNDER EXHAUST SYSTEM KIT, ALUMINIZED STEEL -- Dual Side Exit Exhaust System (DOS), Benefits Include Reduced Backpressure For Improved Acceleration And Towing Power, Cooler Underhood Temperatures, A Cleaner And More Efficient Burn In The Combustion Chambers, Better Fuel Economy, Features Mandrel Bent 16 Gauge Aluminized Steel Tubing, Delivers Lesser Interior Resonance, Includes 3.00%X94 Tubing From Trans Crossmember Back, H-Pipe, Super 40 Series Mufflers, And Hardware, Welding All Slip Connections Recommended, With Manufacturer's Limited 3-Year Warranty

Fits the following 1965-1967 Buick Gran Sport submodels:

• 1965-1967: Base; All Engines;