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Price: $622.00 - $648.00

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Headers for 1973-1987 Trucks and 1973-1991 Suburbans, Blazers and Jimmys. Part number THY-303Y-C, THY-303Y-S-C or THY-303Y-DA-C. These are set up for dual exhaust (no-y-pipe included) and are not CARB legal unless your truck was originally equipped with dual exhaust.

These Doug Thorley Tri-Y headers are constructed of 14-gauge tubing with 3/8-inch flanges to give you the best quality you can get in a header! Plus they are ceramic coated to give a lifetime of performance!

• Fits: 1973-1987 Chevrolet - GMC Truck and 1973-1991 Suburban, Blazer and Jimmy 2wd

• Engine: Big Block Chevy 366-454 cid

• Tri-Y Design

• Tube Size: 1-3/4-inch Primary and 2-1/2-inch Collector

• Lifetime Warranty on Headers as well as Ceramic Coating

• Made in USA

• Notes 31

• Free Shipping in the Lower 48!

• GM Emissions Explained

• Click here for Installation Instructions - PDF Format