I had them. The fit cant' be beat. You can install them with the engine bolted in place.
The performance can be beat. Going to a big tube header in magazine tests showed almost a 1/2 second 1/4 mile time.
My issue with the performance is that when I went to the TTI's my engine simply ran better and I'm not talking about power. It idled better in several ways, it ran cooler as well. The fitment of the TTI's suck IMO. So take your pick. Fitment or performance. If I had to do it again (with stock suspension) I'd go Schumacher.
Add: I used TTI 440-200's (2") along with their 3" system which has some issues of it's own that COULD easily be corrected.
