Cat Delete LLY? [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Cat Delete LLY?


14wntr
10-04-2009, 10:43 PM
Will deleting the cat make any performance improvements on its own? I am specifically looking for better mileage especially while towing.

jbrown1132
10-04-2009, 10:57 PM
i can't speak for fuel mileage improvements but removing the cat will lower the egts a bit.

14wntr
10-05-2009, 08:09 AM
Is it very restrictive? What about other mods? Which could help the most with mileage and not break the bank?

Tyler@MPF
10-05-2009, 09:10 AM
Like said above mileage will be very minimal, but the egt drop is worth it. The cat is the most restrictive part of the exhaust.

A tuner and exhaust usually help mileage 2-3.

Tyler
MPF

1953drtelco
10-05-2009, 02:04 PM
Will deleting the cat make any performance improvements on its own? I am specifically looking for better mileage especially while towing.

The best bang for the buck (Under $90.00) so far has been the LBZ MP. Not only did I see an improvement with towing, I also have less fan activity....I did also install a TCAI airbox as well.

LWATSON
10-05-2009, 08:15 PM
I just recently removed my cat. The only benefit is lower EGT's, I saw no performance gain and no gain in fuel mileage, the stock muffler is the most restrictive component on the exhaust system not the cat.