bigbens6 wrote:
Typically they perform well, sound like dookie, some fitment issues, and it is commonly aluminium steel so you will want to keep a can of high temp paint around for touch ups. On the mazda KLDE they made decent power but sounded like crap...
I have used their cat back, it worked well, sounded like crap, its cheap for a reason...
On the KL motor, they give the most power out of any other option.... but they sound like crap because they're unequal length. And for whatever reason, what makes the Subaru boxer engines sound so awesome doesn't work so well on a Mazda V6. 
I have a Doug Thorley header on my RN Truck, Megasquirted 22R, torquer cam. I put the header on when the motor was stock with the original carb and no other changes and I don't think there was any performance difference over the factory 22R header. The header was on clearance sale for like $150 when I bought it. I see that's about what the Pacesetters are going for these days:
http://www.alamomotorsports.com/pacesetter/pacesetter_toyota_truck_headers.html
That's who I bought my Thorley header from a few years ago. I don't see them list Thorley anymore, but they might be able to get them.
ALL of my experiences with Pacesetter have been horrible. That includes vintage motors, rotaries, V6's, and V8's. They are very poorly designed, have horrible build quality, and sound terrible. Multiple dyno tests of different cars have shown a power loss with them. I won't use or recommend them.
