I have a set of 1 3/4' SLP headers that I got for cheap and was wondering what I can use for a Ypipe? Will it fit the stock one and what aftermarket ones will bolt up?

 

No way, no how.

Modifying your existing pipe or having a new one fabricated are probably your most likely success routes.

You may find one for sale on the classifieds here or eBay. The only one that would fit would be an SLP piece.

 

Now would be the perfect time to open the collectors up, or cut them off and weld on a better collector and fab up a nice true 2.5" Y pipe, or sell them to someone interested in doing that, if you have em the middle of jan, i'll be interested

 

0% chance of 'opening them up', but you could (like mentioned above) cut them off and weld up some flowmaster ball flanges, but they go from 3" to 2.5". http://www.flowmastermufflers.com/cg...ml?id=r9gVU2Mn
Or some dr. gas ones, even better... keep it 3". http://www.drgas.com/Ball-Cone-Adapter-Joints.asp
Or just buy the SLP ypipe for $199. No part no., just call them, you can buy it.

 

Yeah, you can sell me your headers cheap, I can use them and they'll match the rest of the exhaust.. lol