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#1
18-09-2013, 10:08 AM
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Downpipe question...
Hi,
I am thinking of changind the downpipe on my hawkeye wrx. The engine let go yesterday, typical ring land failure, and is going to API for a rebuild, so now would seem a good time to do it...  Options for the hawk seem a bit more limited than the other newage cars, but I was thinking of replacing the downpipe and 2nd decat I have with a single downpipe sports cat... However in the garage I still have the 2nd cat - anyone now wether the car would pass it's mot with a decat downpipe, and the 2nd cat put back in place?? Thanks, J.
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Currently very broken Hawkeye WRX 
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#2
18-09-2013, 11:56 AM
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Hi lupuss, sorry to hear about the engine. Damn those 2.5's eh....
Every car is different with emissions, but I reckon you'd be lucky for it to pass an MOT with the 2nd cat and a decat downpipe, i have a feeling the 2nd cat is much smaller than the one in the downpipe?
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#3
18-09-2013, 12:24 PM
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Sorry to hear about the engine dude,
Why not get rid of the cats completely, If your having a rebuild engine done then perhaps get a full 3" system (turbo back) also remove the up-pipe cat and get a nice remap? .. come MOT time simply fit the downpipe cat or find a "friendly" MoT center? 
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Somewhere drinking Coffee Mapped and maintained by FBTuning 07595 493581.
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#4
18-09-2013, 12:24 PM
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Tell me about it!! Wish I had a 2l engine instead, they seem much stronger...
I thought that might be the case with the downpipe, was wondering wether I could get away with it... The car was using a lot of oil, but no smoke... Stuart @ ESMS did a leakdown test for me which confirmed the problem, then cylinder 2 let go yesterday on the way to work yesterday Got to use the bus for 4 weeks now  J.
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Currently very broken Hawkeye WRX
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#5
18-09-2013, 02:08 PM
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only new-age 2.0 WRX cars ever had up-pipe cats.............
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 ASPerformance 0191-4103770 PELTOR, PFC BRAKES, PAGID MOTUL, FERODO, SPEEDLINE, TRS, MINTEX, PIAA, HELLA, TEIN, WHITELINE, SUPER-PRO, MILLERS OILS online shop!!
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#8
19-09-2013, 08:04 AM
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I'm running a full Miltek system on my 2.5 with only a centre section sports cat. 100% MOT pass rate, (when warm) at 3 different garages.
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2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter
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