Dirt Late Model Tri-Y Headers have 4-into-2-into-1 tube configuration for increased torque and horsepower. Fits American Made, Barry Wright, Bullit, GRT, Larry Shaw, Stinger, TNT, Raider, Rayburn, Stinger and TNT. NOTE: WILL NOT FIT GRT COMPUTER CAR. DOESN'T LIKE 4-7 SWAP CAMPit Stop USA offers Schoenfeld Tri-Y Dirt Late Model Headers - SB Chevy - 18° Heads - 1-3/4", 1-7/8" Tube - 3-1/2" Collector 14260VY18 at low everyday prices. Be sure to check out all of our products from Schoenfeld Headers including Schoenfeld Dirt Late Model Headers.