Engine & Fuel System
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OMIX 17430.23 Piston Ring Set (.060) for 72-90 Jeep CJ Vehicles & Wrangler YJ with 3.8/4.2L
OMIX
$69.99Description Learn More Specs Fitment Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 4-6 hours Parts IncludedPiston Ring SetWarranty Minimum 5 Year Limited Warranty. Engine Size: 3.8L I-6, 4.2L 258ci I-6Engine...$69.99 -
OMIX 17430.07 Standard Piston Ring Set for 84-93 Jeep Cherokee XJ & Wrangler YJ with 2.5/4.0L
OMIX
$59.99Description Learn More Specs Fitment Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 4-6 hours Parts IncludedPiston Ring SetWarranty Minimum 5 Year Limited Warranty. Engine Size: 2.5L I-4, 4.0L I-6Engine Fuel:...$59.99 -
OMIX 17427.22 Piston & Pin (.020) for 79-90 Jeep CJ's & Wrangler YJ with 4.2L
OMIX
$69.99Description Learn More Specs Fitment Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 4-6 hours Parts IncludedPistonWarranty Minimum 5 Year Limited Warranty. Engine Size: 4.2L 258ci I-6Engine Fuel: GasolineShipping...$69.99 -
OMIX 17427.21 Standard Piston for 79-90 Jeep CJ's & Wrangler YJ with 4.2L
OMIX
$59.99Description Learn More Specs Fitment Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 4-6 hours Parts IncludedPistonWarranty Minimum 5 Year Limited Warranty. Engine Size: 4.2L 258ci I-6Engine Fuel: GasolineShipping...$59.99 -
OMIX 17427.10 Piston & Pin (.040) for 83-95 Jeep CJ's & Wrangler YJ with 2.5/4.0L
OMIX
$52.99Description Learn More Specs Fitment Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 4-6 hours Parts IncludedPistonWarranty Minimum 5 Year Limited Warranty. Engine Size: 2.5L I-4, 4.0L I-6Engine Fuel:...$52.99 -
ProMaxx Performance Products CHR640NB ProMaxx Performance Cylinder without Valvetrain for 91-04 Jeep Wrangler YJ, TJ, TJ Unlimited, Cherokee XJ, Grand Cherokee ZJ & WJ with 4.0 L
ProMaxx Performance Products
$759.00Description Learn More Specs Fitment Restore horsepower, compression and fuel economy to that tired engine with one of our factory replacement heads. Matches original performance flow. Cast # 0331, 0630 & 7120. These are the only NEW Jeep®...$759.00 -
OMIX 17410.04 Push Rod for 81-90 Jeep CJ Series & Wrangler YJ with 4.2L Engine
OMIX
$2.69Description Learn More Specs Fitment Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 4-6 hours Parts Included1 Push RodWarranty Minimum 5 Year Limited Warranty. Engine Size: 4.2L 258ci I-6Engine Fuel:...$2.69 -
OMIX 17427.29 Piston & Pin (.030) for 79-90 Jeep CJ's & Wrangler YJ with 4.2L
OMIX
$69.99Description Learn More Specs Fitment Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 4-6 hours Parts IncludedPistonWarranty Minimum 5 Year Limited Warranty. Engine Size: 4.2L 258ci I-6Engine Fuel: GasolineShipping...$69.99 -
Crown Automotive 6035516 Cylinder Head Bolt for 87-06 Jeep Wrangler YJ, TJ & Unlimited; 87-01 Cherokee XJ & Comanche MJ and 93-04 Grand Cherokee ZJ & WJ with 2.5L or 4.0L Engine
Crown Automotive
$3.59Description Learn More Specs Fitment Double Ended Head Bolt Measures 1/2"-13/ 7/16"-14 x 6" Long Installation NotesInstallation Difficulty:Level 2IntermediateInstallation Time: Less than an hour Parts Included 1 Cylinder Head Bolt Warranty 12...$3.59 -
Crown Automotive 6035514 Cylinder Head Bolt for 81-06 Jeep CJ, Wrangler YJ, TJ & Unlimited; 87-01 Cherokee XJ and 93-04 Grand Cherokee ZJ & WJ
Crown Automotive
$2.69Description Learn More Specs Fitment Measures 1/2"-13 x 3.7" LongFor 2.5L 4-Cylinder and 4.0L & 4.2L 6-Cylinder Engines Installation NotesInstallation Difficulty:Level 2IntermediateInstallation Time: Less than an hour Parts Included 1 Cylinder Head...$2.69 -
Crown Automotive 8133254K6 Crankshaft Main Bearing Set for 65-90 Jeep CJ & Wrangler YJ; 87-90 Cherokee XJ & Comanche MJ and 71-86 SJ & J-Series with 6 Cylinder Engine
Crown Automotive
$90.99Description Learn More Specs Fitment .010" Under Size Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 6-8 hours Parts Included Crankshaft Bearing Set Warranty 12 Month/12,000 Mile Limited Warranty. Engine Size: 3...$90.99 -
Crown Automotive 83500301K4 Standard Connecting Rod Bearing Set for 83-02 Jeep CJ, Wrangler YJ & TJ and 84-00 Cherokee XJ & Comanche MJ with 2.5L Engine
Crown Automotive
$29.99Description Learn More Specs Fitment .010" Undersize Installation NotesInstallation Difficulty:Level 4Experts OnlyInstallation Time: 6-8 hours Parts Included 4 Bearing Sets Warranty 12 Month/12,000 Mile Limited Warranty. Features:...$29.99