Ireland has some that nobody here has tried. They're cheap. All you can be certain of gaining with these is noise & a weight reduction of a few pounds from the stock exhaust manifolds. They're not long tube headers & nobody has dyno'd a before & after scenario for gains.
I'm waiting about 3 weeks already for his 284 regrind cam.
Oh yeah, Scotty H was burned by Ireland.
https://secure3.nexternal.com/shared...unt2=580024361