Mahle GS33478 Engine Cylinder Head Bolt Set

Mahle GS33478 Cylinder Head Bolt Set

The Mahle GS33478 engine cylinder head bolt set is built for OE-standard service on select Toyota and Lexus applications. It uses steel fasteners with a hex head style and is specified for engine sealing jobs where accurate clamping force matters.

Key Features

• OE Standard item grade for factory-style service
• Steel fastener material for engine hardware applications
• Hex head style for common service-tool engagement
• Fastener style: bolt
• Washers not required per product attributes
• Additional package contents: none

Detailed Description

Mahle GS33478 is an engine cylinder head bolt set designed for repair work that requires dependable head fastening and consistent sealing performance. Mahle is known for gasket and sealing products used by OEMs and technicians worldwide, and this hardware follows that OE-focused approach with steel construction and an OEM Standard grade. This part cross-references FEL-PRO ES 74035 and Toyota 90910-02132, 90910-02181 for the same application. It is a strong match for Toyota Tundra, Toyota Sequoia, Toyota Land Cruiser, Toyota 4Runner, Lexus GX470, and Lexus LX470 cylinder head service where the listed fitment applies. The part number GS33478 is the reference to verify before ordering, and GS33478 should be matched to the engine application and service procedure.

Vehicle Fitment

• Fits 2003-2009 Lexus GX470, N/A. Contains Cylinder Head Bolt Washers; Steel.
• Fits 2003-2009 Toyota 4Runner, N/A. Contains Cylinder Head Bolt Washers; Steel.
• Fits 2001-2009 Toyota Sequoia, N/A. Contains Cylinder Head Bolt Washers; Steel.
• Fits 2000-2009 Toyota Tundra, N/A. Contains Cylinder Head Bolt Washers; Steel.
• Fits 1998-2007 Lexus LX470, N/A. Contains Cylinder Head Bolt Washers; Steel.
• Fits 1998-2007 Toyota Land Cruiser, N/A. Contains Cylinder Head Bolt Washers; Steel.

Common Repair Uses

• Replacing stretched or damaged cylinder head bolts during engine rebuilds
• Restoring proper cylinder head clamping after head gasket service
• Addressing sealing issues caused by worn or reused head fasteners
• Supporting engine repair on Toyota Tundra, Sequoia, and Land Cruiser platforms
• Supporting Lexus GX470 and LX470 cylinder head service

Installation Notes and Tips

Confirm engine code, head bolt pattern, and service procedure before installation. Clean threaded holes thoroughly, inspect the cylinder head and block surfaces, and follow the manufacturer’s tightening sequence and torque specifications exactly. Because this is engine hardware, proper preparation and torque control are critical to sealing performance.

Quality Assurance

Mahle supplies sealing and engine service products used in OEM and professional repair environments. GS33478 is an OE Standard hardware set intended to meet the demands of cylinder head service on the listed Toyota and Lexus applications.