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..

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 | Jeep Wrangler & Cherokee 1997-2004 4.0L | Reduces Heat Soak & Vapor Lock | Reflective Heat Shield | Made in USA

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