i installed a set of Flowtech headers on my engine before dropping it into my firebird. they're summit part #BIG-11102.
the passanger side is hitting my frame (flange only, but the rest is pretty damn close at about 1/4 inch)
I also got the flowtech Y pipe and that also seems to be of a bad clearance. it hits the floor when connected (i matched it up) to the header.
the add says it's for a firebird and a 400 SBC.. but i can't see this working without bending the collector away from my frame and taking the Y pipe and making an extention for the passanger side pipe so it can go lower.

has anybody else ever installed these headers and Y pipe and run into any of those problems?
i've got pictures if they need to be shown, just ask but it's soo tight back there it dosn't show well.

 

go get a set of good headers. or u can always return them

 

I have those headers and y-pipe. Quality aside they are a great fit. I bet you have worn motor mounts. Changing them should allow everything to line up like it should.

 

jocww, THANK YOU FOR THE GREAT ADVICE, do you have any more wisdom to part with?!

thanks ShiftyCapone, i'll see if that makes a difference (i think they're original.. should of changed them when i had the motor out, my fault)

 

They should cure your problem. It is common when people put hedders on these cars.