You and your intakes
Is this poll for the intake AND exhaust hp gains compared to stock, or is it the intake gains after custom exhaust. If its the first, ill say 5-10, if it's the second...1-5. Numbers id put my money on are 10 and 2
now...remembeing that chike's car has had the cams, and presumebly fuel pump, injectors, and an ecu chip done...an intake and exhaust could possibly yeild more on his engine that a stock one, due to the increased time the valves are open, ect. But once again, I dont think the intake and exhaust are overly restrictive
When you say no paricular exhaust configuration, please specify weather the car will be street legal or not...Seems to me straight pipes with MABEY a muffler would be "the best", but it'd probly have a hard time passing inspection