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Jet 4.0L Performance Chips


1991-2006 Jeep Wrangler YJ, TJ and Jeep Cherokee

Jet Performance Products is a proven leader in automotive tuning technology. Their background in tuning started with Jones Performance Fuel Systems over 40 years ago. The Fuel Systems Division has given them the opportunity to tune everything from NHRA drag race cars, off-road race trucks and Sprint Cup cars. This experience has been the basis for their line of performance tuning products for street applications. JET's engineering staff is unsurpassed and considered to be the best tuners in the industry. their talented staff has made the company what it is today.

Constant changes in computer technology of today's cars and trucks demand that the JET engineering staff be the best. Automotive computer systems progress daily, just like every form of technology, so they are dedicated to providing the customer with the latest in performance tuning technology possible. Extensive research and development, dyno testing and constant fine tuning ensures the most power from each part they make.



4.0L

Image Description Part # Price
Performance Chip, Stage1 4.0L Automatic

Performance Chip, Stage1 4.0L Automatic


1995 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99511 $239.99
+ FREE SHIPPING
Performance Chip, Stage1 4.0L Automatic

Performance Chip, Stage1 4.0L Automatic


1994 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99411 $239.99
+ FREE SHIPPING
Performance Chip, Stage 1 4.0L Automatic

Performance Chip, Stage 1 4.0L Automatic


1993 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99311 $239.99
+ FREE SHIPPING
Performance Chip, Stage1 4.0L Automatic

Performance Chip, Stage1 4.0L Automatic


1993 Jeep Wrangler YJ & Cherokee


99211 $239.99
+ FREE SHIPPING
Performance Chip, Stage1 4.0L Automatic

Performance Chip, Stage1 4.0L Automatic


1991 Jeep Wrangler YJ & Cherokee


99111 $239.99
+ FREE SHIPPING
Performance Chip, Stage2  4.0L Automatic

Performance Chip, Stage2 4.0L Automatic


1995 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99511S $250.46
+ FREE SHIPPING
Performance Chip, Stage2 4.0L Automatic

Performance Chip, Stage2 4.0L Automatic


1994 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99411S $250.46
+ FREE SHIPPING
Performance Chip, Stage 2 4.0L Automatic

Performance Chip, Stage 2 4.0L Automatic


1993 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99311S $259.99
+ FREE SHIPPING
Performance Chip, Stage2 4.0L Automatic

Performance Chip, Stage2 4.0L Automatic


1992 Jeep Wrangler YJ & Cherokee XJ


99211S $259.99
+ FREE SHIPPING
Performance Chip, Stage2 4.0L Automatic

Performance Chip, Stage2 4.0L Automatic


1991 Jeep Wrangler YJ & Cherokee


99111S

Regular Price: $250.46

Special Price: $199.20

+ FREE SHIPPING
Performance Chip, Stage 1 4.0L Manual/Auto

Performance Chip, Stage 1 4.0L Manual/Auto


2004-2006 Wrangler TJ, TJ Unlimited & Grand Cherokee


90413 $239.99
+ FREE SHIPPING
Performance Chip, Stage 2 4.0L Man/Auto

Performance Chip, Stage 2 4.0L Man/Auto


1996-2003 Jeep Wrangler TJ & Cherokee


90015S $259.99
+ FREE SHIPPING
Performance Chip, Stage1  2.4L Auto/Manual

Performance Chip, Stage1 2.4L Auto/Manual


2004-2006 Jeep Wrangler TJ & Unlimited


90410 $239.99
+ FREE SHIPPING
Performance Chip, Stage1 4.0L Man/Auto

Performance Chip, Stage1 4.0L Man/Auto


1996-2001 Jeep Cherokee & 1997-2003 Jeep Wrangler TJ


3.5/5
90015CHIP $238.99
+ FREE SHIPPING
Performance Chip, Stage2 4.0L Manual/Auto

Performance Chip, Stage2 4.0L Manual/Auto


2004-2006 Wrangler TJ, TJ Unlimited & Grand Cherokee


90413S $259.99
+ FREE SHIPPING
Performance Chip, Stage1 4.0L Manual

Performance Chip, Stage1 4.0L Manual


1995 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99512 $239.99
+ FREE SHIPPING
Performance Chip, 4.0L Manual (Stage 1 - for stock or mildly modified vehicles, Low Octane Fuel)

Performance Chip, 4.0L Manual (Stage 1 - for stock or mildly modified vehicles, Low Octane Fuel)


1994 Jeeps (See More Info.)


99412 $239.99
+ FREE SHIPPING
Performance Chip, Stage1 4.0L Manual

Performance Chip, Stage1 4.0L Manual


1993 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99312 $263.99
+ FREE SHIPPING
Performance Chip, Stage1 4.0L Manual

Performance Chip, Stage1 4.0L Manual


1992 Jeep Wrangler YJ & Cherokee XJ


99212

Regular Price: $239.99

Special Price: $193.17

+ FREE SHIPPING
Performance Chip, Stage1 4.0L Manual

Performance Chip, Stage1 4.0L Manual


1991 Jeep Wrangler YJ & Cherokee


99112

Regular Price: $239.99

Special Price: $193.17

+ FREE SHIPPING
Performance Chip, Stage2 4.0L Manual

Performance Chip, Stage2 4.0L Manual


1995 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99512S $259.99
+ FREE SHIPPING
Performance Chip, 4.0L Manual, (Stage-2 For High Performance, 91 Octane Fuel)

Performance Chip, 4.0L Manual, (Stage-2 For High Performance, 91 Octane Fuel)


1994 Jeeps (See More Info.)


99412S $250.99
+ FREE SHIPPING
Performance Chip, Stage2 4.0L Manual

Performance Chip, Stage2 4.0L Manual


1992 Wrangler YJ & Cherokee XJ


99212S $259.99
+ FREE SHIPPING
Performance Chip, Stage2 4.0L Manual

Performance Chip, Stage2 4.0L Manual


1991 Jeep Wrangler YJ & Cherokee


99112S

Regular Price: $250.99

Special Price: $199.20

+ FREE SHIPPING
Performance Chip, Stage2 4.0L Manual

Performance Chip, Stage2 4.0L Manual


1993 Jeep Wrangler YJ, Grand Cherokee ZJ, Cherokee XJ


99312S $272.99
+ FREE SHIPPING

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