To date, there is no aftermarket Intake
manifold that you can buy that replaces the stock manifold; however, you can have it milled out for higher air flow. A machine shop will do that but there are controversies right now that some argue milling the Intake
manifold will do no positives. I have yet to see a natural aspired celica with a milled Intake
manifold. However if you keep reading you'll find out more information. I have more information about milling and port polishing but I doubt it is 100% accurate so I will not disclose this information.
Flywheels are available; however, Mike Lu has a lightened flywheel, maybe he could help you there. [ 10-23-2002, 08:58 AM: Message edited by: Steven ]