RSR 935 style Lightened Flywheel for 6 bolt or 9 bolt crankshaft. Machined from steel billet, properly heat treated, and coated black. Weighs 7 pounds, perfect compromise beteween stock and a super light set up. Lets face it... 901's and 915's are not designed to be shifted quickly or you will destroy your gearbox very quickly. This flywheel is the perfect weight to enjoy a quick reving engine but not so light that you actually lose revs quickly between shifting gears. These are great for all around street/sport/race applications.