i have the rpm kit now and im pretty happy with it, but like, most of us here i wanna go faster but i dont wanna jump into the offshore kit. does anybody know of any upgrades that would work well with the rpm kit?

Also... what's the MSRP on the new RXP X?

i cant believe that no one has ported cylinder heads for these engines. if there are any shops out there, who does um ?

It's been done. You don't hear much about it due to the minimal gain for a lot of work and $$$. It's similar to extrude honing the exhaust manifold.


MSRP on the RXP-X is $12,999.00.

RC what kind of gains with extrude honing the exhaust mani ?

Recommendation

I have a STX15F. I buy the RMP KIT. What other Product can i use?.
Can i use the RD PowerShot ADJUSTABLE FUEL TUNER. This will not damage the engine.
I use 87 octane, no any problems?

inchadeboca - Extrude honing yields minimal gains, is very expensive and there is a good chance they will break through the inner wall of the exhuast pipe which makes is useless. It's one of those mods you do when you've done pretty much everything else and you're still looking for a little more.


Gorgie - With our RPM Kit no additional fuel is required so you do not need the Power Shot. You will be safe running 87 octane unleaded pump gas so long as it is fresh.

When I went to Maccracing I asked Chris about extrude honing the manifold. He said a stock 15f motor he dynoed made 8 more HP than stock. Cost was $450 which is reasonable for cost to power gain. He also showed me one he had laying around. Looked good. Give him a call if you have any questions or to hear it from him.