Get a catalog from Downey (
www.downeyoff-road.com), a catalog from NWOR (
www.northwestoffroad.com), and take a look at DOA Racing (
www.doaracingengines.com). These are probably the best people for performance for your truck.
My truck is like yours but am not sure if yours is 4WD like mine. I chose Downey as my headers people as it seems that the majority, if not all, of the reviews I have read about their headers on the 3VZ gave it a thumbs up for noticeable performance gain. NWOR and PaceSetter also makes a header for the 3VZ too.
As for the exhaust, I decided to go with NWOR's cat-back since it's completely bolt-on, it's stainless steel and has a nice tip to it. If Downey's exhaust was stainless and completely bolt-on, I would have went with theirs but theirs is only aluminum and required welding. BTW, Downey's exhaust is 2.5" while NWOR's is 2.25".
I will be having my throttle body bored out by DOA Racing as this mod seems to be the second most noticeable performance gain right after the headers from what I have read.
I would stay away from K&N's FIPK as the hot air blown away by the fan from the engine goes to the air intake side of the engine bay. Ask me how I know.
As for chips/modules, I was told by DOA Racing to stay away from JET's ECU upgrade or Venom's module.
I also have a Random Technology cat since I gotta support the hometown team.
__________________
1989 Toyota 4WD P-up Ext. Cab SR5 V6 Auto (currently out of commission)
2005 Dodge Neon SRT-4
- 11.9 @ 117 1.79 60' (best trap 120 mph)
- 30.8 mpg city/hwy (pulse & glide), 33.4 mpg hwy
- 178,000+ miles (still on original motor)