Howe Y-Pipe 2 into 1 3" to 4in HASZ21LT DX III-h / M

DX III-h / M

150 in Coil Bind

1981-1981 Pontiac Firebird

Nomex (R) back

Testing resulted in a peak of 507 horsepower and 487 ft-lbs of torque @ 5 PSI on a 350 CID with 9

Howe Y-Pipe 2 into 1 3" to 4in HASZ21LT DX III-h / MProduct Description: Exhaust Y Pipe 3 in Inlets 4 in Outlet Steel Gray Paint Sold Individually Howe Racing Enterprises began building and selling chassis and components in 1971 and since then we have produced countless innovative products and over 4,000 serial numbered chassis worldwide. Howe has dedicated 52 years and three generations to providing superior products for racing. The types and uses of Howe products continually change, but the original