Wiseco Pistons for the Honda/Acura B18A/B engine. Wiseco makes several B-Series Pistons and we try to keep several of the most popular part numbers in stock. Just select which part number best fits your application from the list below, and include that part number in the paypal notes section of your payment.
Have a question about bore size or compression ratio?
Want an expected ship date on a specific part number?
Email us now at Sales@RealStreetPerformance.comWhether you damaged your stock internals, you are building an all out race engine, or you are just looking to upgrade your stock bottom end. Wiseco is one of the most trusted and affordable options on the market period.
COMES WITH RINGS, WRIST PINS, AND LOCKS!Integra 1990-00 B18A1/B1 | Part # | Application | Bore Size | Compression Ratio |
| K541M81 | B18A1/B1 | 81.00mm (Standard Bore) | 8.3:1 - 8.6:1 |
| K541M815 | B18A1/B1 | 81.50mm (+.020" Overbore) | 8.3:1 - 8.6:1 |
| K541M82 | B18A1/B1 | 82.00mm (+.040" Overbore) | 8.3:1 - 8.6:1 |
| K542M81 | B18A1/B1 | 81.00mm (Standard Bore) | 9.3:1 - 9.8:1 |
| K542M815 | B18A1/B1 | 81.50mm (+.020" Overbore) | 9.3:1 - 9.8:1 |
| K542M82 | B18A1/B1 | 82.00mm (+.040" Overbore) | 9.3:1 - 9.8:1 |
| K566M81 | B18A1/B1 | 81.00mm (Standard Bore) | 11.1:1 - 11.6:1 |
| K566M815 | B18A1/B1 | 81.50mm (+.020" Overbore) | 11.1:1 - 11.6:1 |
| K566M82 | B18A1/B1 | 82.00mm (+.040" Overbore) | 11.1:1 - 11.6:1 |
| K593M81 | B18A1/B1 | 81.00mm (Standard Bore) | 11.8:1 - 12.4:1 |
| K593M815 | B18A1/B1 | 81.50mm (+.020" Overbore) | 11.8:1 - 12.4:1 |
| K593M82 | B18A1/B1 | 82.00mm (+.040" Overbore) | 11.8:1 - 12.4:1 |
1997-02 B20B with VTEC Head| Part # | Application | Bore Size | Compression Ratio |
| K545M84 | B20B w/ VTEC Head | 84.00mm (Standard Bore) | 8.4:1 - 8.8:1 |
| K545M845 | B20B w/ VTEC Head | 84.50mm (+.020" Overbore) | 8.4:1 - 8.8:1 |
| K545M85 | B20B w/ VTEC Head | 85.00mm (+.040" Overbore) | 8.4:1 - 8.8:1 |
| K623M84 | B20B w/ VTEC Head | 84.00mm (Standard Bore) | 10.4:1 - 10.9:1 |
| K623M845 | B20B w/ VTEC Head | 84.50mm (+.020" Overbore) | 10.4:1 - 10.9:1 |
| K567M84 | B20B w/ VTEC Head | 84.00mm (Standard Bore) | 11.3:1 - 12.0:1 |
| K567M845 | B20B w/ VTEC Head | 84.50mm (+.020" Overbore) | 11.3:1 - 12.0:1 |
| K567M85 | B20B w/ VTEC Head | 85.00mm (+.040" Overbore) | 11.3:1 - 12.0:1 |
| K594M84 | B20B w/ VTEC Head | 84.00mm (Standard Bore) | 13.2:1 - 14.2:1 |
| K594M845 | B20B w/ VTEC Head | 84.50mm (+.020" Overbore) | 13.2:1 - 14.2:1 |
| K594M85 | B20B w/ VTEC Head | 85.00mm (+.040" Overbore) | 13.2:1 - 14.2:1 |
| K594M855 | B20B w/ VTEC Head | 85.50mm (+.060" Overbore) | 13.2:1 - 14.2:1 |
| K594M86 | B20B w/ VTEC Head | 86.00mm (+.080" Overbore) | 13.2:1 - 14.2:1
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