Why does it say this doesn’t work on 02 wrangler 4.0?

Not sure, but I can tell you it works on a 99 Grand Cherokee 4.0 and an 03 Grand Cherokee 4.0. Not sure what the differences between the wrangler and Grand Cherokee 4.0’s are

Does it fit a 2003 TJ wrangler ?

This Jeep Fuel Rail kit is meant for any Jeep with a 4.0L inline 6 cylinder engine, '97 - '04. This will also work for mater model 4.0L inline 6cyl engine with some modification to the fuel rail sleeve.

Is there any reason why this shield/kit would not fit a 1996 Cherokee XJ 4.0?

If the intakes and fuel rail look the same, it'll likely fit.. There have been small changes in the intake manifold over the years that could make the flat shield not fit..

Will this fit an 82 cj7 4.2 that has mopar mpi installed? it is based on the wrangler 4.0 mpi set up.

Can’t speak specifically to that motor, but this set fits the 99-03 4.0 in the Grand Cherokee for sure and I’m sure the same years of Wrangler.

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🔥 Keep your Jeep cool, your fuel cooler, and your ride unstoppable!

ULTIMATE HEAT DEFENSE - Dual-sided aluminum barrier with high-temp insulation slashes heat soak and vapor lock risks.
BOOST ENGINE RELIABILITY - Keep fuel injectors cooler to prevent vapor lock and maintain peak engine performance.
ALL IN ONE INSTALLATION KIT - Includes manifold shield, fuel rail cover, injector covers, and OE O-rings for a seamless upgrade.
PRECISION FIT FOR JEEP 4 0 L - Tailored specifically for 1997-2004 Jeep inline 6 engines—no guesswork, just perfect protection.
DIY FRIENDLY HOOK LOOP DESIGN - Install like a pro in your own garage—no specialized tools or shop needed.

The Design Engineering Fuel Rail & Injector Cover Kit is a high-performance thermal barrier system designed for Jeep 4.0L inline 6 engines (1997-2004). Featuring a dual-sided aluminum heat shield with high-temp insulation, it effectively reduces heat soak and vapor lock by protecting fuel rails and injectors from radiant engine heat. The complete kit includes all necessary covers and OE replacement O-rings, engineered for easy DIY installation with a hook and loop design, ensuring enhanced engine reliability and fuel efficiency.

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Brand	Design Engineering
Color	Silver
Material	Aluminum
Exterior Finish	Design Engineering Fuel Rail & Injector Cover Kit
Item dimensions L x W x H	6.25 x 1.88 x 15.38 inches
Vehicle Service Type	1997-2004 4.0L Jeep models with inline 6 motor
Style	Modern
Item Weight	9.6 ounces
Automotive Fit Type	Vehicle Specific Fit
OEM Part Number	010378
Manufacturer	Design Engineering, Inc.
UPC	607078103789
Global Trade Identification Number	00607078103789
Model	010378
Product Dimensions	6.25 x 1.88 x 15.38 inches
Item model number	10378
Manufacturer Part Number	10378
Special Features	Reduces fuel rail & injector fuel temps

DESIGN ENGINEERING Fuel Rail & Injector Cover Kit for Jeep (1997-2004, 4.0L Engine) - Our Accessories Reduce Vapor Lock & Keep Fuel Injectors & Rails Cooler

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