Has anyone gutted their own cats?
Is it difficult. Just thinking about it so I can have flat shift and crackle mapped in.
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Gutted cats
Gutted cats
RS4 B7 - Phantom Black, 20in RS6 C7 alloys, Joey mod, detango, led drl, black optics, Bilstein b16, Michelin ps4s, centre res delete, black tips, 8mm spacers, vx lenses, RS embossed xenon, Carbon splitter, 034 ARB.
Re: Gutted cats
Cats or pre cats?
If precats then yes there is a guide on here to guide you through it (or was it on another forum?). So the answer is yes it can be done.
If main cats, then what's the point? Be much easier to get an exhaust fabricator to replace the pipe with straight through pipework.
If precats then yes there is a guide on here to guide you through it (or was it on another forum?). So the answer is yes it can be done.
If main cats, then what's the point? Be much easier to get an exhaust fabricator to replace the pipe with straight through pipework.
Re: Gutted cats
Yeah thinking of gutting the pre cats, not sure if it will effect the mot though.
RS4 B7 - Phantom Black, 20in RS6 C7 alloys, Joey mod, detango, led drl, black optics, Bilstein b16, Michelin ps4s, centre res delete, black tips, 8mm spacers, vx lenses, RS embossed xenon, Carbon splitter, 034 ARB.
Re: Gutted cats
My pre cats are gutted and it does just about get through. I know the guy though
Previously big turbo'd mk4 golf, big turbo'd Audi A3 Quattro
Currently remapped vw caddy
& 2009 rs4 saloon, TTS supercharged, mrc mapped, miltek catback, kwv3, h&r arbs, gutted precats, ceramic brakes 610bhp
Currently remapped vw caddy
& 2009 rs4 saloon, TTS supercharged, mrc mapped, miltek catback, kwv3, h&r arbs, gutted precats, ceramic brakes 610bhp
Re: Gutted cats
Gutted pre cats will defo pass mot
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Re: Gutted cats
Providing everything is ok and they get the car up to temp to 'light' the cats they will pass the MOT emission limits with just the pre-cats removed.
B7 RS4 MTM K540 Sprint loon, Lysholm/Opcon twin-screw supercharger, Ceramics, HEL Hoses, Loba SM Fly, Sachs performance clutch kit, MTM full stainless exhaust system with freeflow cats & quad valved tailpipes, Hotchkis ARB's, Bilstein B16 Coil Overs, LED Rear lights, Interior & LED 50W DRL's, Buckets in race cloth, Black optics, FBSW, Titanium pack, Solar Sunroof, Adaptive lights, MTM 10mm spacers Fr & Rr, 193 Nav unit, 2nd careful owner 
Re: Gutted cats
I never had any issues with MOTs and no pre cats.
I had a remap at the same time. You might get a fault light on dash without a remap. Not sure if fault light on dash is an MOT failure now.
I had a remap at the same time. You might get a fault light on dash without a remap. Not sure if fault light on dash is an MOT failure now.
Re: Gutted cats
+1 for passing the MOT with gutted pre-cats. Just make sure you got sensor spacers, to avoid getting a cell error/warning light. And warm the car up first.
Mine’s pretty loud with decats/h-pipe/std rears. With no rear boxes I think it would be too loud for day-to-day use.
Mine’s pretty loud with decats/h-pipe/std rears. With no rear boxes I think it would be too loud for day-to-day use.
Daytona RS4 Avant - black optics/decat downpipes/H-pipe/KW springs - featured on the 2012 Audi stand at the Goodwood FoS
Re: Gutted cats
Great. All booked in for gutted precats and remap.
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Sent from my iPhone using Tapatalk
RS4 B7 - Phantom Black, 20in RS6 C7 alloys, Joey mod, detango, led drl, black optics, Bilstein b16, Michelin ps4s, centre res delete, black tips, 8mm spacers, vx lenses, RS embossed xenon, Carbon splitter, 034 ARB.
Re: Gutted cats
Do they charge much for the gutted cats? They wanted around £450 to fir a supplied set of decats
2007 B7 RS4 Saloon, Phantom Black, Forge Oil Cooler Kit, custom home made air feed, H&R Coilovers, H&R anti roll bars, 10mm H&R Spacers, Milltek decat downpipes, Milltek Non Res Valved Exhaust, Reyland Motorsports front & rear discs with Hel braided Hoses, full underbody overhauled inc powdercoated subframes and arms, 034 solid subframe bushes and every joint, arm or bush replaced.
Re: Gutted cats
Similar tbf
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Sent from my iPhone using Tapatalk
RS4 B7 - Phantom Black, 20in RS6 C7 alloys, Joey mod, detango, led drl, black optics, Bilstein b16, Michelin ps4s, centre res delete, black tips, 8mm spacers, vx lenses, RS embossed xenon, Carbon splitter, 034 ARB.
Re: Gutted cats
You can’t have flatshift and crackles with just gutted pre cats, you’ll need de cat downpipes.
Re: Gutted cats
Yes you can 
Might just prematurely kill the cats if used too much.
Might just prematurely kill the cats if used too much.Re: Gutted cats
MRC said they can but cannot be sure how long the main cat will lastRS4LAD wrote:You can’t have flatshift and crackles with just gutted pre cats, you’ll need de cat downpipes.
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RS4 B7 - Phantom Black, 20in RS6 C7 alloys, Joey mod, detango, led drl, black optics, Bilstein b16, Michelin ps4s, centre res delete, black tips, 8mm spacers, vx lenses, RS embossed xenon, Carbon splitter, 034 ARB.
Re: Gutted cats
I think it would eventually decat itself with the crackles but not sure how long that would take !!!
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
RS4 B7 - Phantom Black, 20in RS6 C7 alloys, Joey mod, detango, led drl, black optics, Bilstein b16, Michelin ps4s, centre res delete, black tips, 8mm spacers, vx lenses, RS embossed xenon, Carbon splitter, 034 ARB.
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