I was thinking about getting the electronically controlled Y pipe for my exhaust so I could dump it before the cat. They offer them in various sizes. I have the HRC kit and I was wondering what size I will need so that I can hook up up right after the DP. I was thinking of getting a 2.5" DP but if I don't, what size is good? Keep in mind I have the apexi N1 NT exhaust right now which I believe is slightly smaller than 2.5". Will bolting this up be a problem?

MODS:

HRC 16g turbo kit, Spearco custom FMIC, Custom IC piping, VT rebuilt engine: Custom 8.8:1 compression CP pistons, Eagle connecting rods, Melling oil pump, Clevite bearings, 370cc injectors, Vortech S-FMU, Apexi N-1 catback exhaust, AFX UDP, Autometer boost gauge, fuel pressure gauge, EGT gauge, Corbin's digital A/F gauge, Tokico Blue shocks, Tein springs (1.5" drop), 18" Konig Verdicts rims, VIS stock-style Carbon fiber hood

2.5" will be fine. Tell us how it goes.

pollution kills....
up the boost if you want more power

1998 dodge avenger 4 cyl AT
Mods are:
Not enough

MODS:

HRC 16g turbo kit, Spearco custom FMIC, Custom IC piping, VT rebuilt engine: Custom 8.8:1 compression CP pistons, Eagle connecting rods, Melling oil pump, Clevite bearings, 370cc injectors, Vortech S-FMU, Apexi N-1 catback exhaust, AFX UDP, Autometer boost gauge, fuel pressure gauge, EGT gauge, Corbin's digital A/F gauge, Tokico Blue shocks, Tein springs (1.5" drop), 18" Konig Verdicts rims, VIS stock-style Carbon fiber hood

I was thinking about the same thing earlier this week, but have it so it only opens up at high rpms (NA)

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-Ryan