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Shortly after the intercooler tests, UPFD installed a Fidanza flywheel. At over 20-pounds lighter than our stock 36-pound flywheel, the car revs faster in the top end. Enthusiasts concerned with off-the-line performance may want to keep the heavier flywheel to more effectively launch off the line. An engine with a lighter flywheel such as this helps revs climb with much more ease once the car is already in motion. A lighter flywheel also aids in heel-and-toe rev matching during downshifts-something road racers prefer. Made from 6061 T6 billet aluminum with accompanying Grade-10 aerospace fasteners and a replaceable 1050 steel friction surface, this flywheel is a great bang for the buck. Just make sure to raise the idle a couple hundred rpm to avoid engine stalls at a traffic signal.