I came from a '99 TJ Wrangler before the FJ, the FJ is a big performance upgrade over the older Jeeps. For an '07-09 truck, the first place where most people lose power is by running regular gas instead of premium (the truck is tuned for premium). The truck can detune without harming the engine, but you're giving up 20-30 horsepower over premium. The 35's will have an impact on performance, but @FJess has been running 35's for 5+ years with no regear or supercharger (which they don't make for the '10+ trucks).I have been wheeling around the Rockies on a 99 Jeep XJ for about 8 years and doing it quite well but i'm ready for some Toyota fun! Purchased a 2008 FJ with 87k and I have a decent budget to start out with. Thinking 6" inches and 35's and I have been seriously debating the TRD super charger as my XJ just didn't cut it in the power regime making mountain passes at 45-50.
The main issue you're going to run into with the TRD superchargers is availability, they're not making them anymore. New-in-box units are rare and expensive, and used ones rarely sell separate from the truck they're attached to :rofl:. So my advice would be to research regearing instead of supercharging, but I would drive the FJ on 35's with premium gas for 6-12 months just to make sure that you need to do it.
Welcome to the forums!
Thanks for the plug!Welcome! Check out Colorado FJ cruisers on Facebook. Good group of FJ peeps!
We're centered around Denver but anybody is welcome to join. We host mod/install days, have discounts with local vendors, organize trail runs over the summer and host our own FJ Roundup event over Labor Day in Buena Vista. For people who aren't in Colorado we also help plan their Colorado trips, suggest trails, set up runs with members etc.