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1999 Jeep Wrangler Performance Chips & Programmers

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Latest Customer Reviews

Hypertech Max Energy Programmer Reviews

Hypertech Programmer

Reviewed By David N (Henderson, NV) Reviewed for a 1999 Jeep Wrangler —5/15/2013 7:12 PM

I choose Hypertech because I also own one for my 2001 diesel truck and it works very well, this one for my jeep was a little harder to install, the program (required me to use my computer) but was no problem. There is a definite HP increase, I also put a new header and exhaust on which I recommend before increasing HP in any motor.

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Banks PowerPack System Reviews

Banks Powerpack 99 TJ 4.0

Reviewed By John P (Silverthorne, CO) Reviewed for a 1999 Jeep Wrangler —10/28/2009 12:55 PM

It definitely takes some time to get the headers on what with having to remove the intake manifold, fuel rail, etc. but the end result is well worth the effort. My jeep has 33s and a 4 inch lift, and it feels like a sports car now in comparison to the way it used to be. Much more torque and throttle response, and much more powerful overall. I am also noticing a substantial fuel efficiency increase and added about 45 miles to my average tank of gas overall. It also ends up with a very "meaty" yet still uniquely jeep sound. I would recommend the Banks Powerpack system to anyone with a Jeep as I can't speak highly enough about it.

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Jet Performance Module Reviews

New To Jet Products

Reviewed By Ken S (Verona, KY) Reviewed for a 1999 Jeep Wrangler —1/2/2009 11:44 AM

This Is My First Purchase Of Any Jet Merchandise. Easy Install....Well.....Except Changing Out The Stock Thermostat To A 180 Degree One, Which Is Required For The Stage II Module On The 4.0 Straight 6 Engine. That Seemed To Become A Major Ordeal For Some Reason. We Will Call That "SGS" ("S"tupid "G"uy "S"yndrome). All That Aside, Everything Went Fine. I Started The Vehicle Up After Install And After Warming Up For A Few Minutes, Immediately, I Noticed A Definite Smoother Idle. I Also Noticed A Definite Cooler Operating Temp On The Dash Gauge. After Driving Fairly Conservative For About 8-10 Miles, I Did Some Harder Accelerating From Stops And On Entrance Ramps To The Interstate. They Was A Definite Improvement In Acceleration Thru The Whole Powerband And The Throttle Seems Much Snappier. Now, Don't Read Into This Too Much. This Is Not A Mind Boggling Change In Performance, But It Is Noticeable. I Have The Banks Power Torque Tubes And Monster Exhaust And That Install Improved Performance. I Installed The Banks Power Ram Air System And That Improved Performance A Little. I Installed An Aftermarket Throttlebody Vortex Spacer And That Was The Least Noticeable In Performance. I May Try The Jet Throttlebody Spacer To See If That Is Better. Soooo...........What I Am Saying Is Every Little Enhancement Helped The Performance. It's Too Early To Tell About Gas Mileage. I Recommend These Type Of "Bolt On" Upgrades Over Tearing An Engine Apart, Changing Heads, Pistons, Cams.......Etc. I Purchased This Jeep New 10 Years Ago And Kinda Babied It Over That Time. I Also Installed New Fender Flares And Body Armor Just As A 10 Year Birthday Gift To The Jeep As With All The Above Installed Items.

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