alright so im rebuilding/upgradin everything on my mk3...and from pepboys has a fuel pump for mk3...it is one for a twin turbo app.. i was wondering is this just like the 255?..like an upgraded fuel pump?..and also for cam seals and main seal...would it be reliable to use their seals?...im possibly onyl going for 3-4oo hp...not much something i can be happy in