X4XZ Exhaust Manifold Stud Kit for 4.7L V8 (6505257AA) — Heat-Treated Studs, Screws & Lock Nuts

These X4XZ 6505257AA exhaust manifold stud, bolt and nut kits replace OE 6504331 and secure the exhaust manifolds on 4.7L V8 engines for Jeep, Dodge, Chrysler and Mitsubishi vehicles.

If your vehicle has a leaking or broken manifold stud, this complete kit provides the studs, screws and flange nuts needed to reattach the exhaust manifold to the cylinder head. Manufactured from heat-treated steel to meet OEM-level fit and strength, the set includes both short and long studs to cover upper and lower mounting positions. Use the kit to restore a tight, stable connection that resists deformation from heat and vibration.

Which vehicles and engines will this kit fit?

This kit is intended for 4.7L V8 engines across several Chrysler-family models and model years. Fitment includes Dodge Dakota, Durango, Ram 1500, Jeep Grand Cherokee and Commander, Chrysler Aspen and Mitsubishi Raider within the listed year ranges—always verify against the vehicle’s service manual or the provided compatibility image.

• 2000–2007 Dodge Dakota 4.7L V8
• 2000–2009 Dodge Durango 4.7L V8
• 2002–2008 Dodge Ram 1500 4.7L V8
• 1999–2009 Jeep Grand Cherokee 4.7L V8; 2006–2009 Jeep Commander 4.7L V8
• 2007–2009 Chrysler Aspen 4.7L V8; 2006–2007 Mitsubishi Raider 4.7L V8

What parts are included in the 6505257AA kit and which OE numbers does it replace?

The X4XZ kit includes all hardware needed to replace failed exhaust mounting points on both left and right manifolds. It supplies short and long studs, hex head screws, and hex flange lock nuts that correspond to common OE references for this family of engines.

• 4 × Short Stud (6505257AA)
• 4 × Long Stud (6504331)
• 8 × Hex Screw (6504340)
• 8 × Hex Flange Lock Nut (6505316AA)
• Replaces OE# 6505257AA, 6504331, 6504340, 6508219AA, 6508220AA, 6507746AA, 6505316AA

How durable and reliable are the studs, bolts and nuts in this set?

X4XZ manufactures these fasteners from high-quality steel with heat-treatment to improve strength and resistance to the exhaust system’s high temperatures. The components are engineered to resist extrusion and deformation so the fastening points remain secure under repeated thermal cycles and engine vibration.

• Heat-treated steel for enhanced tensile strength
• OEM-quality dimensions for correct fit and torque
• Flange lock nuts reduce loosening from vibration
• Parts designed for both upper and lower manifold positions

How difficult is installation and what should I expect during replacement?

Installation is straightforward for someone with basic mechanical skills and standard hand tools. No instruction manual is included, so consult a repair guide or service manual for torque specs and removal order to avoid damaging studs or the cylinder head threads.

• Fits directly into OEM mounting locations—no modification required
• Use proper anti-seize and specified torque to prevent future seizing
• Replace studs in matched sets to maintain even clamping force
• Recommended: access via vehicle service manual or professional help if unsure

Who is this for: Professional mechanics and DIY enthusiasts working on Chrysler-family 4.7L V8 engines who need a complete, OEM-replacement-quality manifold stud and fastener kit. It’s suited for repairs involving broken, corroded or missing studs and for restorations where reliable exhaust sealing and proper clamping are required.