Have the Comp m6, swapped to Akra, and so glad I did so. Something about having ti metal resonance really brings out the V8. And it only gets better with catted/catless DP's. I'd def go with the akra as opposed to the m-perf because I'm thinking it'd command a better resale value when I dispose of the vehicle (and/or more desirable in the 2ndary market).
Another, aesthetic note, prefer the matte CF tips Akra has opposed to the cut out tips M perf has.
Regardless of the upgrade, def get exhaustmeister so you can manually control valves as opposed to wiring them open all the time and/or only operating the vehicle in sport/+ to have vales open.
Besides spacers, the exhaust upgrade is a must. Akra>Mperf -- but in this pandemic, it really boils down to lead times, availability, and your own price sensitivity/elasticity.
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