Pontiac Owners Club UK

got a 90/91 thirgen twin cats.

does a decat pipe exist for this ?

They do but from the states

http://www.summitracing.com/int/search/ ... -turndowns

But if you order from summit and use I-Parcel as delivery method you pay all taxes upfront so it doesn't get held up in customs when it arrives here.

The link above includes some y pipes for aftermarket cats as well so check that the one you look at is for decat

if i remove them does the car run ok or does it need setting up .

also where do the small pipes go that come of each cat

car will run fine/better with cats removed
the pipes go to the air injection pump, just leave them disconnected or remove them

if i buy this http://www.summitracing.com/int/parts/w ... /overview/

do i just need a test pipe to join to this http://www.summitracing.com/int/parts/w ... /overview/

would like stainless but cant stretch to it just now.

existing exhaust is a disaster and need ripping out.

should work fine