I just raced my WRX against another WRX from stop, no launching just a regular step on gas when the light turns green race. The whole time we were neck and neck with him slightly ahead, but the funny thing is when we pulled over all he had was an uppipe and downpipe. My car has a turboXS hpbc, downpipe, uppipe, HKS catback, Samco intercooler hoses, Samco inlet, ported and polished throttlebody, K&N drop-in. Since I have more mods shouldn't I be a bit faster . I could only think of two reasons 1. Lack of engine management 2. My boost was only at 14psi in third. But isn't the advantage of an mbc faster spool? Well, it was good friendly race with another WRX .