Bonneville America Forums Forums Technical Forums Exhaust odd short TOR's

I wasn't going to tell you to hollow them out but as was stated above you definately need to get a matched set of pipes. Backfire will often result from an exhaust leak. The popping is probably due to the air fuel mix being wrong on one side since you have different restriction on one side than the other and still have the crossover I imagine. Your exhaust is probably trying to escape out the less restricted side drawing some air in from the more restricted side causing the popping.