JEEP 4.0L/242 Parts and Accessories

Rear disc brake conversion kit with built-in parking brake assembly, '90-95 Wrangler, red, includes performance rotor upgrade

Part Number: TSB-A128R-DS

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Estimated Ship Date: Feb 27, 2026 if ordered today

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Rear disc brake conversion kit with built in parking brake assembly, '97-06 Wrangler/TJ D44, black powder coat

Part Number: TSB-A128-4BK

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Estimated Ship Date: Mar 2, 2026 if ordered today

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Rear disc brake conversion kit with built-in parking brake assembly, '95-01 Cherokee, black powder coat, includes performance rotor upgrade

Part Number: TSB-A128-6BK-DS

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Estimated Ship Date: Mar 2, 2026 if ordered today

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Rear disc brake conversion kit with built-in parking brake assembly, '90-95 Wrangler, black powder coat, includes performance rotor upgrade

Part Number: TSB-A128BK-DS

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Estimated Ship Date: Mar 2, 2026 if ordered today

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Catalytic Converter, Cal-Cat Direct Fit, Slip Fit Inlet, Slip Fit Outlet, Ceramic Honeycomb, Heat Shield, Jeep, Each

Part Number: WLK-80943

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Estimated Ship Date: Mar 2, 2026 if ordered today

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Catalytic Converter, Cal-Cat Direct Fit, Stock Flange Inlet, Stock Flange Outlet, Ceramic Honeycomb, Heat Shield, Jeep, Each

Part Number: WLK-82791

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Estimated Ship Date: Mar 2, 2026 if ordered today

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Catalytic Converter, Ceramic Honeycomb Substrate, Rear, Jeep, 4.0L, Each

Part Number: WLK-82789

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Estimated Ship Date: Mar 2, 2026 if ordered today

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Ring and Pinion Gears, 3.73:1 Ratio, Standard Gear Rotation, Designed for Dana 44-HD Applications, Set

Part Number: YGA-24049

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 6, 2026 if ordered today

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Ring and Pinon Gears and Installation Kit Combo, 4.56:1 Ratio, Dana 30 Front, Dana 35 Rear, Jeep, TJ, Non-Rubicon, Kit

Part Number: RMG-XLK-5010

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Exhaust System, Cat-Back, Stainless Steel, Polished Stainless Tip, Jeep, 2.5, 4.0L, Kit

Part Number: MPE-15854

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Estimated Ship Date: Feb 25, 2026 if ordered today

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Exhaust System, Cat-Back, Stainless Steel, Polished Stainless Tip, Jeep, 2.5, 4.0L, Kit

Part Number: MPE-15853

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Exhaust System, Cat-Back, Stainless Steel, Polished stainless Tip, Jeep, 3.8L, Kit

Part Number: MPE-16695

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Ring and Pinon Complete Kit, XJ D30 STD/C8.25 4.56

Part Number: MGR-MGK-125

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Estimated Ship Date: Feb 25, 2026 if ordered today

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Ring and Pinion Gears,Yukon Gear & Axle 8.25" CHRYSLER, 4.88 Ratio Rear Ring & Pinion GearInstall Kit 1.62" ID Axle Bearings & Seals

Part Number: YGA-10591

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Estimated Ship Date: Mar 9, 2026 if ordered today

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Ring and Pinon Gears and Installation Kit Combo, 4.88:1 Ratio, Dana 30 Front, Dana 35 Rear, Jeep, TJ, Non-Rubicon, Kit

Part Number: RMG-XLK-5011

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Ring and Pinon Gears and Installation Kit Combo, 4.10:1/4.09:1 Ratio, Dana 30 Front, Dana 44 Rear, Jeep, TJ, Non-Rubicon, Kit

Part Number: RMG-XLK-5012

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Ring and Pinon Gears and Installation Kit Combo, 4.56:1 Ratio, Dana 30 Front, Dana 44 Rear, Jeep, TJ, Non-Rubicon, Kit

Part Number: RMG-XLK-5013

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Piston Set, 4.0 Jeep 6 Cyl. K1-FX Series -10cc Jeep Dish Top Piston Set. 3.875 bore

Part Number: DMS-K1-6650-3875

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Piston Set, 4.0 Jeep 6 Cyl. K1-FX Series -10cc Jeep Dish Top Piston Set. 3.905 bore

Part Number: DMS-K1-6650-3905

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Piston Set, 4.0 Jeep 6 Cyl. K1-FX Series -15cc Jeep Dish Top Piston Set. 3.905 bore

Part Number: DMS-K1-6652-3905

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Piston Set, 4.0 Jeep 6 Cyl. K1-FX Series -15cc Jeep Dish Top Piston Set. 3.915 bore

Part Number: DMS-K1-6652-3915

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Piston Set, 4.0 Jeep 6 Cyl. K1-FX Series -15cc Jeep Dish Top Piston Set. 3.935 bore

Part Number: DMS-K1-6652-3935

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Piston Set, 4.0 Jeep 6 Cyl. K1-FX Series -21cc Jeep Dish Top Piston Set. 3.875 bore

Part Number: DMS-K1-6653-3875

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Estimated Ship Date: Feb 24, 2026 if ordered today

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Piston Set, 4.0 Jeep 6 Cyl. K1-FX Series -21cc Jeep Dish Top Piston Set. 3.905 bore

Part Number: DMS-K1-6653-3905

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 24, 2026 if ordered today

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Piston Set, 4.0 Jeep 6 Cyl. K1-FX Series -21cc Jeep Dish Top Piston Set. 3.915 bore

Part Number: DMS-K1-6653-3915

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Estimated Ship Date: Feb 24, 2026 if ordered today

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