Has anyone tried the new contoured billet base for the K&N flame arrestor? I see it advertised a few months back, but could not find the listing on the K&N or the REX Marine sites. If your using one, did it provide any performance increase? Would like to put on my 502 EFI. Also, what was the price? Thanks, Chuck.

[ 01-13-2002: Message edited by: cdscarab ]

cdscarab i think your talking about the unit in cpperformance catalog or on their web site made by hardin marine / k+n for the efi
engines. i have one on my 1998 26 sonic with
502efi. i picked up 3miles an hr with this and lab finished prop. went from 67mph gps to 70mph gps , so don't know exactly what i gained from each ,because did both changes at the same time.

cdscarab,
I called Rex Marine and they have the billet adapter and K&N filter for the 502 MPI for $145.00. I just had my ECM reprogramed by Energized Fuel Injection and they said to use the K&N filter and adapter from Livosi or the Rex Marine version. They dynoed these and they showed the best improvement of all the aftermarket flame arrestors. Hope this helps.

I added a K&N and reprogramed ECM from AZ Speed and the MSD Booster and saw exactly zip in top speed increase.

454 Mag EFI on a 27 Fountain.

It did clean up my transom up about 90% though.

vonbongo was thinking of doing the same upgrades as you did and add imco power flow exhaust on my 1998 502efi, did you have to change your prop ? so you really think it was a waste of money? did your rpms increase?

I think it's only a cosmedic Thing.
I went out one day and did a few WOT passes with my GPS. then I stoped and Removed My Air filter completely. So there was 100% NO restriction. Did the same passes, And seen no differance whats so ever Try it. And if you see a differance, then maybe it will work for you. Good luck

WOW, thanks guys. Am getting 502 ready for dyno and was thinking that the K&N element/billet base would be an improvement over stock. Hmmm, was expecting more diffinitive results. Gonna hafta sleep on this one. CD