How to install 91 gsx downpipe? help...

[sentoyang]

hello everyone,

i recently bought a downpipe and its not excalty a bolt on.
The start is 2.5" but then it goes to 3".

and my cat. is 2.5"... so what am i gonna do?.

anyhelp would be great.

[Blackcrow64]

Get the rest of the exhaust done in 3" or sell it and get one that is only 2.5 the whole way.

[sentoyang]

... i don't even think they sell those. the 2.5" full downpipe i mean. Thanks anyways...

anyone care to buy a brand new 91 gsx downpipe LOL!

[sentoyang]

... is there anyway that i can connect the two?...
I mean this prolbem will exist even if i want to buy a megan catback.

the megan pipe inlet is 3" and the catalytic converter is 2.5". I've searched but i can't find a 3" inlet and 3" oulet for a catalytic conv.

so in short, i can't connect either from the downpipe's outlet or the catback's inet.

the only thing that is 3" is testpipes and i don't want to be caught.

so yeah...

another thing... if i have the 3" downpipe, and i bought the megan racing 3" exhaust system... so i just connect the two? or do i have to have a test pipe in the middle? can someone please show me a diagram of a complete exhaust system form manifold to muffler... I'm confused now.

[Blackcrow64]

Well then your gonna have to get two reducers from 3"-2.5" if you wanna leave the stock cat in there...

Or you could buy this... http://www.summitracing.com/parts/MPE-59959/