OK, so....I now have an '08 wit da 5.3. I'm planning on getting some LTs here soon, and I want to know if there is a y-pipe out there that is made to allow me to keep my cats??? I removed the cats on my '02 and regretted it.
OK, so....I now have an '08 wit da 5.3. I'm planning on getting some LTs here soon, and I want to know if there is a y-pipe out there that is made to allow me to keep my cats??? I removed the cats on my '02 and regretted it.
R.I.P Blue '02
'08 - 5.3
Vette Servo, Flowmaster 40
yea they some companies offer a y-pipe with high flow cats built in
Hmmmm, that could work, but i would prefer to get just the y pipe to use w/ my stock cats.. Do you happen to know the companies names or even have links???Originally Posted by CHEVROLADE
R.I.P Blue '02
'08 - 5.3
Vette Servo, Flowmaster 40
That is kind of a waste. Just IMO. I would use high flow or nothing with LT's.
ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06
waiting to go in... 3.90s, 214/220cam
Would I have to worry about fuel economy without cats? I do plan on getting retuned as soon as headers are on btw.
R.I.P Blue '02
'08 - 5.3
Vette Servo, Flowmaster 40
Generally speaking the cats are a serious restriction to exhaust flow. You will likely be about the same on gas mileage maybe a little better, but the biggest difference will be the tune it should help your MPG and together with LT's you will make some fun power.
ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06
waiting to go in... 3.90s, 214/220cam
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