The first two sets fit well I really liked them ! ... the first set I bought used many many years ago when they wore out I purchased a brand new set also many years ago, they eventually wore out also so I went to TTIS ( I don't care for them ) I purchased a brand new set of Tubular Automotive headers 2 years ago , had them coated to the tune of $1400 total invested and they fit poorly : they hung so low I couldn't get the car in my trailer , one tube hit the steering so hard it made a hole in the tube and I had a really hard time slipping the collector on the tubes during installation . I called them , they repaired the tube no charge and couldn't understand why they didn't fit after having two sets before . They wanted me to bring the car up to see what was wrong but I never did and I went back to the TTIs. I sold the Tubular Automotive headers. Now the TTIs .. I don't like how close they fit to the trans ( I had to modify my shifter linkage for them to fit ) and they are really heavy being basically one piece . The only advantage is that I don't have to run a 90 degree oil filter adapter and can use a shorty filter instead. I purchased one of their H pipes last year and it also fits poorly ( my mufflers hit the driveshaft ) I had it rebent and it still hits.. I have to address the matter again before racing season starts again.