ok so i got everything for the install finally after 3 months of buying stuff here n there... so i went with a 2.5 custom exhaust with a magnaflow muffler....??? is should i put the magnaflow resanator on it...and what about the pre cat and the cat...if i take them off will that throw cells.....also what vac line do you install the boost gauge and the boost controller on.....also were u put the sensor for the airfuel gauge......ok well sorry about all the ?????........thanks for the help