01-04 Duramax PPE Manifolds & Up PipesPPEs High Flow Exhaust Manifolds and Up Pipes have a 53% greater flow over stock, NO EGR PROVISION PPE Manifolds are made from high quality cast iron and the Up Pipes are made from 11 gauge 304 stainless steel. The aircraft grade 304 stainless steel Up Pipe bellows are high flow, internally sleeved, and have an increased inner diameter. Features: Cast Hi Sil Moly iron high flow manifold construction Significant reduction in exhaust back pressure Free

This results in a sleek

For those who demand even more

Up To 10+ HP Over Stock

Please notice that the timing in this software is rather aggressive

Installation is as simple as swapping a fuel plate

BD 90-deg compressor cover with 2

This part is legal under the provisions of EPA’s Tampering Policy dated November 23rd

Increased Performance and spool up

2-Piece Exhaust Manifold

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you'll have an option for whatever you're doing with your 7

in one way or another they're ALL detectable