Josh Boone

How many cats are on my 99 trans am and If I take them off and leave the sensors will I throw a code I really want my car to be louder right now it has a slp loud mouth cat back.

SouthernRex

If it's anything like my 1998, it has two, both are not really in removable positions. It's 100x more feasible to get headers and a catless y-pipe than to try to remove them. (One of them is in the manifold.)

Nathan C

If you remove the cats you will throw a code unless you get it tuned out.

Josh Boone

SO is there any way I could run true duels?

2kSilverSS

Texas speed and speed engineering both offer true duel setups that have been reviewed on this forum. There are other setup as well you could look into...they are usually trade some ground clearance and require a panhard rod relocation bracket. They can be rather loud but nothing worse than loud mouth with off road Y-pipe.

RPM WS6

iTrader: (3)

There are two cats, the driver side one can be unbolted (assuming it's not rusted in place) but the passenger side one would have to be cut out of the Y-pipe on a '98-'99 car. It will eventually throw codes if you don't replace the rear O2 sensors with simulators or get a custom tune.

Josh Boone

Where can I buy the simulators?

01CamaroSSTx

iTrader: (3)

WS6Store sells them just look up O2 simulators.

firebatbirdv8

yes you can, i have the kooks LTheaders with true duals and green cats.and the best mod i have done for a proper v8 sound,

01CamaroSSTx

iTrader: (3)

I bought the off road setup and yes the KOOKS exhaust is pricey but worth the $$$.