Review on Flowtech 31170FLT Ceramic Headers by Jordan Perez

I have them on my 1971 Pontiac GTO 455. As I said they fit my car perfectly with no modifications and the ceramic coating is beautifully applied. I use dead, soft aluminum manifold gaskets and there have been no leaks. The manifolds are well designed allowing easy access to the oil filter for a hot oil change and cleaning my original OEM starter as well as the mini high torque starter that replaced it. The only (non)issue is that the headers are unequal lengths, with the passenger side flange being further from the rear of the car than the driver side. If you are replacing an existing set of headers, you may need to shorten the passenger side mid-pipe or lengthen the driver's side mid-pipe to match, but generally you will still need to bend the new pipes for a custom fit.