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I have a 21 Mach 1. 12k miles. Resonator delete and X-pipe. No other mods. 6 speed manual tranny. Run Chevron 91 octane. Today I did an aggressive pull for about 150 yards then backed off and took an off ramp. Heard a very loud backfire from the front end of the car. I thought that I blew a...

Greetings, folks... I searched the forum first and didn't see anything that directly pertained to my question... I'd appreciate any input.. So, I decided to do a resonator delete and X-pipe install on my active exhaust equipped '21 Mach 1. No other mods. End result is wicked awesome. But, I...