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BMW 3-Series (E90 E92) Forum
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335i decatting - UK
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| 07-11-2012, 10:31 AM | #1 |
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335i decatting - UK
If anyone can help here I would appreciate the info.
I'm wondering (a) if I remove the cats on my 335i does it still comply with emission regulations? (b) what is the horsepower gain? I've heard on some cars it can be upto 20hp |
| 07-11-2012, 11:37 AM | #2 |
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I'm just about to have my VRSF catless downpipes fitted in a couple of weeks.
I'll be posting some pics and power gains for info. I doubt it'll pass the emmissions test, but you may have a 'friendly' MOT centre or just re-fit originals for test time. HTH Andy
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| 07-11-2012, 03:28 PM | #3 |
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You will see HUGE gains from catless downpipes with a tune. I dont know your countries regulations but $$ can always make anything happen
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[SIZE="2"]Crimson Red E92 335i M-sport 6-speed with MHD custom stage 2+ flash only , 40% E85/93 mix,+ HRE P40S wheels, KW Clubsport, M3 sways,+BMW performance CF Mirrors, BMW Performance CF deck lid spoiler,+ CF interior trim, p3 vent boost gauge,+ LUX angel eyes (11.73@124mph on street tires)
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| 07-11-2012, 03:43 PM | #5 |
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won't pass mot mate...and you'll need to find a friendly tester!
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| 07-11-2012, 03:43 PM | #6 |
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dat boost doe
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| 07-11-2012, 03:50 PM | #8 |
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There are 4 cats in the exhaust , if you retain 2 you will pass if you take the car to sniffer really hot and maybe add E85.
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07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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| 07-11-2012, 04:51 PM | #9 |
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This is discussed ad nauseum in the UK technical forum!
No readiness codes. Will pass emmissions. But There is now a visual inspection for CAT's. Depends if the MOT tester takes the time to look closely...
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| 07-11-2012, 04:58 PM | #10 | |
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Quote:
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07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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