Subject: Re: Early C4 exhaust by bogus on 2009/9/18 1:15:03
Quote:
LT4BUD wrote: Quote:
DaleD wrote: I'm due for an inspection this year, and then one more after that before I'm exempt. They just do a tail pipe here in Ohio, no physical.LT1 only has 2 cats? So, going to an LT1 exhaust shouldn't pollute any more, just reconfigure the cats?
I am not sure you are totally correct on this..
Last time I did mine they just connected to the ALDI and looked for codes, no dyno test
However I really think they still do at least randomly look under the car with a mirror..
With my Collector Plates no more inspection for me
That's because the LT4 is an ODBII car.
The cats are a good comment, but poorly stated.
The 1987-91 L98s had 3 cats. Two small pup cats on the down pipes and a big central main cat. The pup cats were designed to light off quicker to provide better cold start emissions.
When they went to the LT1 (and LT5), the cats were on the down pipes only, no more pups no more central cat.
The main cats were easily 3/4th the size of the old main only and did a bang up job. My 92 is so damned clean, it ain't funny.
If you do this, get some long tube headers, high flow cats and the rest is cake.
As for a muffler shop doing it... be carefull. If turned in to the EPA, they would get nailed to the wall... $25k fine.
