Exhaust De-cat Advice
#1
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Exhaust De-cat Advice
Looking to upgrade the exhaust on a MY01 WRX.
Should I decat the downpipe or the centre section?
I already have a STI back box fitted.
Not looking for huge power gains, or a lot of noise, just want to get a bit more of that flat four burble.
TSL recommend leaving the front cat for a bit more back pressure, but others recommend removing this and leaving the centre section!
All advice welcome.
Thanks in advance
Should I decat the downpipe or the centre section?
I already have a STI back box fitted.
Not looking for huge power gains, or a lot of noise, just want to get a bit more of that flat four burble.
TSL recommend leaving the front cat for a bit more back pressure, but others recommend removing this and leaving the centre section!
All advice welcome.
Thanks in advance
#2
looking back with hindsight if I wanted to be emmisions frieindly.....
I'd put in a de-cat downpipe and a high flow cat..... Haywood and scott do this set-up as do TSL.
Will pass MOT (apparantly) with better spool up / noise without mandatory re-map
Midlife.....
I'd put in a de-cat downpipe and a high flow cat..... Haywood and scott do this set-up as do TSL.
Will pass MOT (apparantly) with better spool up / noise without mandatory re-map
Midlife.....
#3
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I Have gone all the way with the Terzo, Haywards & Scott down pipe & center section but kept the old center section for the MOT, only 4 bolts to fit center section 20 mins or so. loveley sound not too loud and a bit more power!!! (we like that) emisions stand at about 1% totally decatted fit the center section then right down below pass rate
Last edited by DGAS; 01 October 2004 at 12:32 AM.
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