About to buy a complete exhaust but its from an ls1 will it match up 2 my lt1? my car is dual cat so im thinking it might...

 

I'm sure with a little modification you could make an LS1 catback fit to your d/c y pipe but I don't think there is any way an LS1 Ypipe is going to bolt to your LT1 dual cat exhaust manifolds.

Then again, with enough modification maybe even that could work too.

 

I know the ls1 catback will work with no mods @ all... but the y-pipe is what im wondering about, if it needs to be all sorts of hacked up then what good is it ya know.. but the catback will bolt up with no problems the lt1 d.c. and ls1 follow the same exhaust pattern.