05-24-2007, 01:28 AM
Join Date: Jun 2004
Location: Gastonia, NC
What I Drive: 05 Sonic Blue ZX3
FF Reputation: 18
Buy-Sell-Trade Rating: (9
I just installed a Cosworth header on my 2.0D.
Got a few questions here.
The header seems to have a VERY tight fit. There's a heatshield at the very bottom, which the header is maybe a 1/4 of an inch above if that. It's almost touching. Not sure if that's a problem.
Also...the Cosworth header only has provisions for one of the 02 sensors. I took the rear one completely out of the car. Is this going to cause any problem to the engine/gas mileage/etc. other than the check engine light? I plan to get a tune from SCT since that will supposedly make me have a much better gain.
Did anyone else replace their header with a cossie, and not feel a significant gain while untuned? I didn't feel much, and if anything I think I lost a little on the low end, but may have gained some high end.
It seems like this flex pipe is too long. My exhaust used to move around a bit on the hangers (if you moved it with your hands) now the flex pipe is such a tight fit inbetween the header and exhaust, the exhaust hardly moves when you push on it. Is this a problem??