Fist off i have a 2003 RCSB 2wd full air ride on 20's. The mods i have are: Gibson Shorty chrome header, custom exhuast, Hpertech PP3 93 tune, dj motorsports cold air intake, vollant throttle body spacer, TB coolant bypass dual electric fans, 8 mm wires, 3.73's and a locker. I plan in the future for a 408 and turbo . Where should i go from here, as far as next mod.

 

Welcome to the forum. Good people and lots of knowledge. You didn't mention what engine you have so it would not be possible for anyone to estimate what power you are putting down or which future modification you should consider. Jim

 

The RCSB comes with both a 4.8 or a 5.3 normally, which do you have?
The 20's will take away from performance, they are usually heavy. I have heard shorty headers dont do a whole lot, should go with long tubes. Throttle body spacer I wouldnt say its not worth the material it costs to make. The 4.8 stock should be around 230 RWHP and the 5.3 a little more. I would guess that the intake, exhaust and tune might have got you about 25 RWHP at most, so my guess for the 4.8 is 255 RWHP and the 5.3 just a little more. What do you mean where should you go from hear for your next mod, do you mean for the engine you have now? If so I would say just swap out for a 6.0 LQ4 Iron block with the 317 heads, drive it for a while, then when you get the money, you can stroke that same motor to a 408