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BMW Tech and Performance
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Extractor / Header for M54B30 330i & 530i
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<blockquote data-quote="ess530i" data-source="post: 414992" data-attributes="member: 13496"><p>bundy... confirm the power loss and higher boost was caused by the stucked cats. after replacing the stock header, the boost was back to normal and power increased by about 15% on my butt dyno. unfortunately, my head gasket leaked as a result of boosting too much with the previously stucked cats</p><p></p><p>back to the wai heng headers... although better (more power) than a stucked stock header, its still crap. the boss informed that the design was copied from a branded header but its bullshit. the piping & joints are upside down and oxygen sensor completely misplaced causing erratic AFR readings. i will see go back to them for a fix or a claim soon. stay tuned... meanwhile stay away from these headers</p><p></p><p>btw i have 2 other options which is to decat my stock headers or go for branded performance headers. any suggestion?</p><p></p><p>i have attached photo of wai heng header & a supersprint (LHD) header. notice the difference. also the location of the o2 sensor</p></blockquote><p></p>
[QUOTE="ess530i, post: 414992, member: 13496"] bundy... confirm the power loss and higher boost was caused by the stucked cats. after replacing the stock header, the boost was back to normal and power increased by about 15% on my butt dyno. unfortunately, my head gasket leaked as a result of boosting too much with the previously stucked cats back to the wai heng headers... although better (more power) than a stucked stock header, its still crap. the boss informed that the design was copied from a branded header but its bullshit. the piping & joints are upside down and oxygen sensor completely misplaced causing erratic AFR readings. i will see go back to them for a fix or a claim soon. stay tuned... meanwhile stay away from these headers btw i have 2 other options which is to decat my stock headers or go for branded performance headers. any suggestion? i have attached photo of wai heng header & a supersprint (LHD) header. notice the difference. also the location of the o2 sensor [/QUOTE]
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Extractor / Header for M54B30 330i & 530i
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