HP racing is the company that manufactures the Toyomoto IS300 header. From what I understand they are of very good quality and not that expensive. The best thing is that they have both CARB model and non CARB w/ high flow cat and O2 simulator. Very well thought out.
As for gains they should be as expected depending on shorty or not. IF doing a shorty I think a couple horses only, but if doing the race header w/high flow cat I would think at least 10 at the crank. Regardless I don't care cause I know it's the biggest bottleneck in the system. With the upgraded cams this is a must to yield a lot of the power. A little timing adjustment would be nice to have too.
Rishie
THIS IS THE HEADER I'VE BEEN WAITING FOR A YEAR TO GET. If it turns out that there's a large group of people quickly I might be able to get a better price. Just depends on how many are ready now.
I talk to AWR and im trying to get a lower price if we get a group by.Right now he is saying $499 if we get just one. no word back from them on the price for a group buy.
