Re: Which headers should I buy, bang for the buck?
I have been running OBX headers and cat back exhaust. Header fitment issue is not given - some cars do, some don't.
Me and Jim V., a few years ago, measured exhaust pressure off of O2 sensor bung hooked up to a pressure gauge. Second gear, 6,000 rpm between OEM exhaust, OBX vs. Corsa was 1.4, 1.0 and 1.0. First two measurements were with my Z (OBX headers) and the last measurement was with Stainless Works headers.
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