Honda Integra GSR B18C1 Overbore Piston Kit (81.5mm)

Restore your engine to factory-fresh compression with this B18C1 rebuild piston kit, precision-sized to 81.50mm for a clean, direct-fit rebuild.

Key Features

• OEM-spec dimensions for a true direct-fit replacement, no special machining beyond a standard hone
• Restores factory compression, oil control, and combustion sealing on a tired or high-mileage engine
• Manufactured to tight tolerances for quiet running and long service life
• Oversized to 81.50mm — the right choice if your original bore is worn, scored, or has already been machined past standard size

Vehicle Fitment

• Honda Integra GSR (DC2)

Not 100% sure this is the right kit for your engine? Send us your engine or chassis number before ordering and we'll confirm fitment.

Technical Specifications

Shipping & Support (New Zealand)

Dispatched from our NZ-based sourcing team, with nationwide shipping and support available if you need help matching this kit to your build.

Note: Bore size should be confirmed against your block's actual measured bore before ordering. Professional installation and machining/measurement by a qualified engine builder is recommended.