Catbacks and downpipes are distinctive animals altogether. The downpipe may be the piping that connects on the turbine. The catback, On the flip side, pertains to anything once the final catalytic converter and goes every one of the way back to the muffler. Having said that, if you want, it https://angelovbhm28528.gigswiki.com/4960674/maximizing_performance_the_ultimate_guide_to_downpipes_for_mercedes_benz_gle_63_amg