The Thrush 89023 is a header back kit for the 1964-1972 GM A-Body platform, covering 1964-1972 Buick Skylark, 1964-1972 Chevrolet Chevelle, 1970-1972 Chevrolet Monte Carlo, 1964-1972 Oldsmobile Cutlass, 1967-1972 Oldsmobile Cutlass Supreme, 1964-1972 Oldsmobile F85, 1964-1972 Pontiac GTO, 1964-1972 Pontiac LeMans, 1964-1970 Pontiac Tempest, built with a dual muffler configuration. Pipe diameters are increased from OEM sizing to improve flow, and the kit is manufactured with precision benders and fixture-checked for a proper, easy installation.

Thrush 89023 Features:

• Pipe Diameter: 2.5 in.
• System Style: Header Back
• System Type: Dual
• Direct-fit application for 1964-1972 Buick Skylark, 1964-1972 Chevrolet Chevelle, 1970-1972 Chevrolet Monte Carlo, 1964-1972 Oldsmobile Cutlass, 1967-1972 Oldsmobile Cutlass Supreme, 1964-1972 Oldsmobile F85, 1964-1972 Pontiac GTO, 1964-1972 Pontiac LeMans, 1964-1970 Pontiac Tempest

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART