Tomei Forged Piston Kit EJ25

Tomei Forged Piston Kit EJ25. Key specs: BORE (mm) 99.75 (OEM +0.25) and COMP.HEIGHT (mm) 30.70 (OEM ±0.0). Worn rings show up as oil burning, blow-by and low compression.

Key features

• :: 99.75 (OEM +0.25)
• :: 30.00 (OEM ±0.0)
• Available in 2 option options

Specifications

• Brand: Tomei
• Part type: Piston
• Category: Cylinder Block Piston
• BORE (mm): 99.75 (OEM +0.25)
• Valve recess: WITH
• COMP.HEIGHT (mm): 30.70 (OEM ±0.0)
• PISTON DOME VOL. (cc): 18.8
• TOP RING (mm): 1.20 x 3.50
• SECOND RING (mm): 1.20 x 4.0
• OIL RING (mm): 2.0 x 2.70

Options

• Option: 99.75mm CH30.70 (STD/2.6), 99.75mm CH30.70 (STD/2.6) CP

Fitment

This listing does not name specific vehicles. Match the part number and the specifications with the part you are replacing.

What it does

Pistons and rings seal the combustion chamber and turn pressure into motion. Using the correct part for your exact engine keeps oil pressure, sealing and timing where the engine was designed to run, and doing related parts at the same time saves taking it apart twice.

Installation & tips

• Check ring end gaps in the bore before installation and stagger the gaps.
• Bearings: Rod and main bearings are usually replaced at the same time.
• Gasket set: The engine comes apart for this job.
• Work on a cool engine with the vehicle secured, and use a service manual for your vehicle for torque specs and procedures.

FAQ

What size is it?
BORE (mm): 99.75 (OEM +0.25); COMP.HEIGHT (mm): 30.70 (OEM ±0.0).

Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.

What should I check before ordering?
Compare the part number, specifications and fitment on this page with your vehicle and with the part you are replacing.

Before you order

• Measure the part you are replacing and compare it with the specifications above.