BlackBetty78

Evening all

I have been looking at purchasing one of the above.

Its a 3 inch exit and I have a 2.5 inch centre pipe I need to mate it to but Im unsure whether it will work effectively.

Ed @ Japspeed is pretty certain it will be fine so long as I use the gasket they provide.

I just wondered if anybody had done this and if it was problem free before I part with hard earned cash.

Thanks in advance.

Dave

BlackBetty78

BUMP

Anybody got any experience mating 3 inch exit to 2.5 inch centre pipe? Surely somebody has done it before or attempted it? Im a complete novice so just want piece of mind before I buy

jaygsi

iTrader: (46)

I bought a 3" Ninja sports cat, but bought a 3" cat back system aswell. Does the cat narrow to 2.5" bore?

BlackBetty78

No it doesnt narrow unfortunately its a Japspeed one thats advertised on here at £199 and its 3 inch exit but rest of my system is 2.5 inch.

I think I may be best to call Ed @ Japspeed next week and talk it through before purchase

ben.harris

iTrader: (2)

I've also got a JapSpeed Sports Cat downpipe, waiting to fit and the rest of my system is also 2.5" from the mid-section back. I bought a GrimmSpeed 3 Inch Downpipe to OEM 2.5 Inch Subaru Catback Adapter to join the two sections as I've read numerous issues with exhausts blowing if the two sections are simply bolted together.

I managed to get a good deal on the adapter on eBay, but this company seem to be the best bet for a UK distributor. Ignore the "2015 WRX" bit - as far as I can tell this will work fine on all years!

EDIT - Thinking about it further, the fact that a company makes something specifically to resolve this problem implies to me that there must be a need for it! Mishimoto also make one, but they were on back-order at their UK distributor and they couldn't advise how long it would take to get one in stock.

BlackBetty78

Thanks for messaging Ben. When do you think you will be fitting your exhaust? If you could keep me posted on how you get on with it Id appreciate it and in mean time Im gonna see if I can find an adaptor on ebay and if not that link you sent is useful plus gonna speak to Japspeed as well I reckon.

ben.harris

iTrader: (2)

Hopefully sometime in the next month. Got a whole load of goodies to fit - ported headers, harvey up-pipe, sports cat downpipe, new clutch and flywheel, plus a whole load of new gaskets! Normally I'd fit the bits myself, but I don't really fancy having a go at the clutch and flywheel, so I need to get it booked in to be done.

BlackBetty78

Sounds like your doing a hell of a lot more upgrades than me Im going to stage one I think and that will be that for me

sy.

iTrader: (8)

You can double up the gaskets put a 3" and a 2.5 together with some silicone around the outer edges it's a bit crude but I've Heard of it being done.