bent09

iTrader: (1)

I am at a quandary.

I have an 06 TL with stock precats and a megan off road straight through also with Jpipe & Atlp exhaust.

Now I have to start working on the car and I have the eshift pro cats sitting in the garage. I was wonding if I just put the precats on and left the straight through would the o2 sensor trip.

What is better:

1. All 3 eshifts
2. stock precats and the megan straight through

justnspace

iTrader: (1)

This came up recently.

djbonsu

iTrader: (3)

yea, OP, i wouldnt put those e-shft percats on with that supercharger bro....they will get backed and discentigrate

stillhere153

iTrader: (1)

I'd have to agree... rv6 v2 precat deletes are so much win

or have a local exhaust shop cut and weld straightpipes cutting out the cat them damn eshit procats

Hi speed

iTrader: (3)

I say run the pro cats. I ran them with my blower and the ATLP 3rd cat delete. Big power, nice sound and no smell. Also looks some what legal if you have to pop the hood for the police. When I took my pro cats off the substrate in the front cat was loose but no cell or power loss.

bent09

iTrader: (1)

Anyone have an idea the potential loss running the regular stock cats with everything else?

Hi speed

iTrader: (3)

I would say running the stock cats will cause a 40-50 hp loss in power from hi flow cats or the deletes. When I first put the supercharger on I was completely stock and it was a ton of fun, but once I installed the Pro cats, J-pipe,and my quads the car picked up 60 hp. There is a lot of talk about the stock cats being too restrictive and raising cylinder temps,making it hard on the engine. I figure why not take full advantage of the supercharger and make full power.

stillhere153

iTrader: (1)

I agree about the gains of full and true free flowing exhaust...

bent09

iTrader: (1)

Wow... I was at 296 at the wheels before in Houston heat... 101 with 90% humidity.

Stillhere153... These are actually your old ones. Think the o2 sensor will trip?