catalytic converters

[nate_the_great17]

hey i have a 2001 trans am ws6, when i got her she had no cats and an x-pipe, ported heads and dyno at 396 rhp and 383 lbs trq other than that dont really know what was done to the car, but i just put an high flow magnaflow cat and a y-pipe w/ flowmasters. the car is emissions legal now but i feels slower should i take off my cat and put long tube headers. i just want more horse power!!!!

[WEZONIT]

The Magnaflow cat's shouldn't be hurting performance that much. I use them in my exhaust setup and have no complaints. Flowmaster is one of the worst mufflers out there as far as performance goes. Changing from true dual's to a single exhaust will also decrease your performance. I would go with some LT's and get a different Cat-back IMO. Leave cat's in there so it doesn't sound too raspy IMO