Web22 mag 2013 · I push the gas and it actually responds immediately compared to 1-1.5 seconds later. as for gas mileage Im not sure yet because I just put them in yesterday but with my old (extremely gunked up injectors) I was getting 12-14 mpg's with 3.5" lift on 33's 3.56 gears and 2.5" cat-back exhaust. Ill update you when I go through this tank of gas. Web1. (1) Crown Automotive Stainless Steel Header Kit for 91-99 Jeep Wrangler YJ & TJ; 91-99 Cherokee XJ & Comanche MJ and 93-98 Grand Cherokee ZJ with 4.0L Engine. In Stock. $389.99. 3.4. (5) Gibson Stainless Steel Header for 91-99 Jeep Wrangler YJ, TJ & (Grand) Cherokee XJ, ZJ, WJ with 4.0L I-6 Gasoline Engine. Ships from 3rd Party.
Jeep 4.0L Engine Performance Upgrades - MotorTrend
Web22 nov 2024 · From the XJ Wiki: In the middle of the 1999 model year, vehicles with the 4.0 liter (242 CID) engine received a much improved intake manifold. This was done to help counteract smaller exhaust porting on the latest casting of cylinder heads, which was done to meet more stringent emissions control laws. Web18 apr 2014 · Gas mileage on my Cherokee has been pretty poor. I have been able to get 14 MPG on the way to my parents and back (140 mile round trip) ... XJ Cherokee - '00 Jeep Cherokee Sport 90 day: 12.96 mpg (US) FoFO - '11 Ford Focus SE 90 day: 36.78 mpg (US) Thanks: 1. Thanked 51 Times in 38 Posts number 35 on the lakers
Jeep Performance Chips - Performance Chip & Car Tuner - Chip …
Web26 feb 2024 · Another potential downside is decreased Jeep XJ gas mileage. Due to the fact that the vehicle’s chassis is raised, air resistance increases, ... Jeep XJ budget boost upgrades have their pros and cons. As we have already said, a Jeep budget boost has that name for a reason. WebJeep Performance Chips are best in class horsepower, torque and fuel economy gains. A 60 second plug-n-play install is all it takes to increase the performance and mileage of your … Web2 feb 2004 · It seems that our mileage improvement was very apparent at lower speed, but was sort of washed away in full-throttle jaunts. The best mileage improvements were recorded on 60- to 70-mph runs. number 37 bus york