Tri Y Thorley headers. [ I know not a true long header ]
welded flanges on the cat bolted to collectors.
Cut up the stock Y moved it back about 1 inch.
Tri Y Thorley headers. [ I know not a true long header ]
welded flanges on the cat bolted to collectors.
Cut up the stock Y moved it back about 1 inch.
2002 GMC 1/2 ton Sierra,4WD, Xct cab, camed, mid-length headers, Nelson tune, electric rad. fan, trany cooler, Heavy 5750 lbs with topper.