decat/group N backbox 04sti
28 November 2004, 02:38 PM
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decat/group N backbox 04sti
Will i notice an improvement in performance if i relace last cat &resonater box and rear box.Ihave 3"inch tsl parts already,dont want the hassle of remap.Is it safeand what sort of power increase should you get over standard
28 November 2004, 02:45 PM
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Originally Posted by Jason Knowles
Will i notice an improvement in performance if i relace last cat &resonater box and rear box.Ihave 3"inch tsl parts already,dont want the hassle of remap.Is it safeand what sort of power increase should you get over standard
Currently only got Group N backbox on my new MY04, but when i put the peashooters back on for the service, i noticed a drop in perforamnce (not massive, but noticed it)
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