ZZP Ecotec Stainless Mid-length Header & Downpipe Combo

14 inch average primary length Near equal length primaries 3/8 inch flanges prevent warping and leakage Larger 1.75" primaries maximize supercharged setups O2 extension harness included Grade 9 downpipe bolts included Stainless steel downpipe Stainless steel mid-length header This is our most affordable header and downpipe package. It installs in under 2 hours. Freeing up the flow of your exhaust allows you to run smaller pulleys safely. Look for gains between 10 and 25 horsepower, depending on your mod level. The downpipe has a 2.5" exit so it connects to a stock or 2.5" aftermarket catback. This header/downpipe setup must remain as a combo and is not compatible with the OEM manifold and/or downpipe.Installation note: Do not wrap these exhaust pieces as cracking can result.  How to order your header/downpipe package: Transmission: Automatic or Manual transmission. This determines the length of the downpipe. Extra O2 bung: Each downpipe comes with a bung for your rear o2 sensor, howe