Ferocity02

iTrader: (59)

Ok guys, I have a 99Z28 right now that I'm selling for a 2002 Silverado 5.3L. I am no stranger to CA smog and exhaust regulations, I've dealt with them for four years with my car. On F-bodies, you can't put in LT headers because they move the location of the cats. However, do LT's on trucks move the cats? The truck I am getting has a Flowmaster 40 series on it. I am thinking if going with duals or something like that, but I want to check out my options first, thanks!

12secSS

iTrader: (30)

Check out the thread I posted, regarding my recent PaceSetter LT install. My cats are in the factory location.

Ferocity02

iTrader: (59)

Anyone else?

Mr. Sandog

Yes, long throws move the cats. There used to be another option, The Other Guys (TOG), who made mid-lengths. The piece was very nice but they went out of business. They went right up to the cats and welded up. Now all you have for options are: (1) shorties, which are not worth the time, or (2) illegal.

CHEVRACER83

i thought lts are illegal in california in general

Mr. Sandog

Not 'in general' but the item has to have a CARB number to be legal. TOG headers were the longest header to have a CARB number (mid-length, better than shorties), now it's just shorties unfortunately.

CHEVRACER83

stock manifold are damn near as good as shorties.... thats why i wouldnt bother.... i think as long as you could put on cats you should be able to have long tubes

Ferocity02

iTrader: (59)

LT's are illegal in CA because they move the location of the cats. So basically, any headers are legal as long as the cats don't move the cats and they have a CARB number.

trever1t

iTrader: (14)

The only thing that matters is that they have a C.A.R.B. number-period. That goes for any engine mod. IE; modifying stock airbox is technically illegal.

Ferocity02

iTrader: (59)

Well, the latter implies the former