In a message dated 5/16/2002 1:45:57 PM Eastern Daylight Time,
taylor9565@msn.com writes:
<<<Dave-
I would not recommend changing the exhaust from the cat back just yet, I'd
install the shaker hood, the 50mm TB, and then add the headers, these newer
R/T's
have pre-cats in the y-pipe with 4 O2 sensors and doing anything from behind
the cat is IMO a waste of time and money>>>
Not true. According to my 2002 FSM, if you have emissions package NAA then
you do not have pre-cats. You have one main cat with an 02 sensor in front
of and behind it.
If you have emission package NAE or NAS then you do have pre-cats with 02
sensors front and rear and a main cat with no 02 sensors front and rear. The
only way to be certain is to crawl under your truck and look.
Bill White - http://www.moparforme.com
'02 QC 4x4, SLT+, 4.7, 5 spd, 3.92's w/LSD, Airaid, MBRP Super Single
Exhaust, Hurst T-Handle, BFG A/T's, IAS Shocks, 180 T-Stat, Jet Chip - Stage
II
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