On an 01 stock header cobra with 2 camber flowmasters. Bassani with cats felt really strong at low end but did not like 'raspy' sound. Wanted deeper sound which replacement Mac no cat H gave. However, noticeable low end torque and acceleration to mid range is less with the H. In quarter mile et would there be a difference? 0-60 is Mac set up really slower or just feels that way.