power gains

Have a Banks Ram-Air system off my TJ - used it for ~15,000 miles and liked it, but decided to change back to stock for quick serviceability and access to filter options. It did seem to help acceleration, it did improve economy slightly, and it most definitely made the Jeep sound "better." At...

Have 3x extra K&N air filters for a 4.0 TJ - somehow I've collected them over the years. One might never have been used, the other two have been. One needs a clean/recharge, the other two look either brand new, or not bad. Take a look at the pics. If anyone is looked to get one, or needs a...

There are some products out there that claim to be able to improve on the already significant engineering that has gone into your motor. The 4.0 engine in the Jeep Wrangler TJ is well known to be a hard engine to get power out of in terms of "bolt-on" modifications. You don't stand to gain any...