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Price: $772.00 - $795.00

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Headers for 1973-1987 Trucks and 1973-1991 Suburbans. Part number THY-364Y4-C, THY-364Y4-S-C and THY-364Y4-DA-C. These are set up for trucks equipped with a 3" catalytic converter and single exhaust (y-pipe included) and are CARB legal.

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 4wd w/ 3-inch Cat. Inlet

• Engine: Small Block Chevy 283-400 cid

• Tri-Y Design

• Tube Size: 1-5/8-inch Primary and 2-1/2-inch Collector

• Lifetime Warranty on Headers as well as Ceramic Coating

• Made in USA

• Notes 2, 13, 17, 22, 28, 31

• Free Shipping in the Lower 48!

• GM Emissions Explained

• Click here for Installation Instructions - PDF Format