air gap vs ld 340
Man, this seems to go on and on forever. The RPM, RPM AG and LD340 are all basically the same intake. They will all make the same power, give or take a few hp. Same goes for the Weiand Stealth intake and the Action Plus.
The Performer intake is no better than a stock 340 intake, only its aluminum and lighter.
We did 2 340 stokers this summer, one with an RPM(non ag) and a Stealth. Both made 560HP and 550TQ.
Go with whatever one you can get the best deal on, LD340's seem to be as much as a new intake these days, at least people are asking as much. And thats crazy.