Elring 290.390 Engine Cylinder Head Bolt Set

Elring 290.390 Cylinder Head Bolt Set

The Elring 290.390 engine cylinder head bolt set is built for Toyota, Scion, and related small-displacement applications that require precise fastener dimensions and a female star bolt head design. With 10 bolts and an M9 x 1.5 x 143 thread specification, this set supports accurate cylinder head service on select Prius C, Yaris, Prius, xA, xB, and Echo engines.

Key Features

• Engine cylinder head bolt set from Elring
• 10-piece set for cylinder head service
• Female star bolt head-/nut design
• Thread size: M9 x 1.5 x 143
• Direct fitment for select Toyota Prius C, Toyota Yaris, Toyota Prius, Scion xA, Scion xB, and Toyota Echo applications
• Cross-references MAHLE GS33476 and Victor Reinz 14-55033-01 for the same application

Product Details

Elring 290.390 is an engine hardware fastener set specified for cylinder head service where the correct bolt length, thread pitch, and head design are critical. The female star drive helps match the OE-style fastening requirement on covered Toyota and Scion engines, including 2020-2021 Toyota Prius C, 2020 Toyota Yaris, 2004-2005 Toyota Yaris, 2001-2009 Toyota Prius, 2004-2006 Scion xA, 2004-2006 Scion xB, and 2000-2005 Toyota Echo. This part number, 290.390, is also listed with multiple aftermarket interchange references for the same application.

What This Part Helps Address

• Replacement of stretched or torque-affected cylinder head bolts during engine repair
• Restoration of proper cylinder head clamping force after head gasket service
• Correction of fastener mismatch caused by incorrect bolt length or thread pitch
• Service on engines requiring a female star head design
• Reassembly of select Toyota and Scion cylinder heads with the correct OE-style hardware

Installation Notes and Tips

Verify engine code, bolt length, thread size, and head design before installation. This set uses M9 x 1.5 x 143 bolts with a female star drive, so confirm the tool engagement matches the fastener head before beginning service. Follow the vehicle manufacturer’s tightening sequence and torque procedure exactly, and replace cylinder head bolts as a complete set when the engine repair calls for new fasteners.

Quality Assurance

Elring is a recognized engine sealing and hardware brand used in professional repair environments. This cylinder head bolt set is specified to match the listed fitments and interchange references for accurate engine service on select Toyota Prius C, Toyota Yaris, and related applications.