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#1
12-10-2009, 12:15 AM
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M54 3.0i Stainless Headers
Is this a bad idea? How would the engine management handle not having any cats? Can you program it to ignore the pre-cat O2 sensor?
http://http://cgi.ebay.com/ebaymotor...ht_3142wt_1161 e53 headers, great deals on eBay Motors on eBay! I am just looking to tap a little bit more power.
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_________________________________________________ 2010 X5M /// R63 AMG...Wifey's 540HP Family Hualer 2001 X5 3.0i Sport 335,448 miles & counting... SMG M3 Steering wheel E46 Stainless Racing Headers 4.6is Exhaust Turner Pulleys Afe Intake Brembo drilled rotors PowerFlex Bushings Hualingan 30mm H&R Spacers rear 20mm H&R Spacers front Bavarian Autosport High-Performance Coils Active Autowerke's Performance Software 
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#3
12-10-2009, 09:02 AM
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If you have to deal w/ emissions then with headers there is no way to make it pass w/o setting off the readiness codes. If you dont have to deal w/ emissions then they will work fine w/ a tune (ask turner/AA to ignore the post cat signals). I tried o2 simulators as well and nothing works yet.
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04 BMW 3.0i X5 on 22" 04 M3 6spd
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#4
12-10-2009, 09:18 AM
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I suggested in a PM reply to wally that you should be able to get away with magnaflow universal cats in place of the center silencer/resonator with some simple extension harnesses on the rear O2 sensors available from many places like jegs.com.
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"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is 
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