I replaced the stock flywheel with an Aluminum one after blowing the clutch at the drag strip last year. After replacing it the spool up time for the turbo is faster. The engine feels more alive and responsive since I had the flywheel put in. I had The Pro-Store do the work. They also got my new clutch. They took some pictures of the flywheel and clutch I'll post them if I can get them. The flywheel they used was from Mueller. Bill's Isuzu Performance also sells the flywheel.