Description:

--It will also retain exhaust heat inside headers improving flow and horsepower!

--Increase High Flow Air, Instantly Gain 10 -15 Hp. / Tq.

--Bolts to OEM Y-Pipe

--TIG Welded CNC Machine Flange

--O2 Sensor Bung Included on Driver Side

Specification:

-1 5/8" diameter tube, large 3" collector, built in hole for the oxygen sensor.3/8" thick flanges ,extremely heavy duty.

Application:

--Fit for SB 265-283-305-307-327-350-383-400 Chevy engines and the 5.0L(305ci)/5.7L(350ci) engines.

--Fit very tight to the block for extra clearance.

Package:

--Packaged with headers, bolt on reducers, exhaust gaskets, collector gaskets, and all necessary bolts

--Professional Installation is Highly Recommended (No Instruction Included)

Vehicle Fitment :