The pipes are 2 1/2 mandrel bent all the way out with a free flow magna flow muffler i cant go 3 inch as i have no room for a bigger pipe .

As for the headers all i can use is block huggers nothing else as the engine bay is so tight that is all that will fit this is a rice burner powered by a chevy

A 1978 datsun 280z the block huggers left me 1/8 th of a inch clearance between the header and the steering shaft there are some full length headers i can buy for 700$ but the diameter is the same size oh and with 2 1/2 inch pipe the pipes are only 3 inches off the ground