Help- 02 supercharged saleen...Ripped exhaust off on a buddy's gravel drive. Drove home-appx 10 -15 miles. Now she doesn't want to start and has a halacious backfire. Can this be due to the 02 sensor and boost a pump wires being ripped off...Or someone suggested may have burnt a valve. It was not an extremely cold day maybe at lowest that night 45? Very worried. Thanks for any insight...Fort supercharged vehicle...So don't really know the ins and outs of that system.