13 2013 Mustang Gt500 Drag And Dyno To The 9S
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When you increase lower pulley size and start powershifting at the track, the cast factory belt tensioner can take a beating and fail. To head that off at the pass, Chuck and Steve installed a Thump Racing (www.thumpracing.com) billet-aluminum belt tensioner (PN PM-1005-GT500; $395) while reinstalling the belts. View Related Article
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