1.8L 16v - B18A1/B1
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1.8L 16v - B18A1/B1
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Forged pistonsHonda B18A1/B18B1 Bores81 86mm, CR OEM8.1 13:1, Pin21mm. Ranges available:Supertech, Wiseco, Wiseco AP. Sorted technical sheet + compatibilities Integra 1990 2001 + Pistons referencesOEM.
Specifications of the forged pistons offered by NSB Concept for 1.8 L 16 v Honda B18A1 / B18B1 :
| Reference piston | Bore (mm)OEM 81 | CROEM 10,5 :1 | pin (mm)OEM 21 | Height pin (mm)OEM 30 | Range | Aluminium | Coating | Forging | Dome (cc) | Weight (g) | Rings |
|---|---|---|---|---|---|---|---|---|---|---|---|
| WK541M81 | 81 | 8,1 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -12 | NC | 8100XX |
| WK541M81AP | 81 | 8,1 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | -12 | NC | 8100XX |
| WK673M81 | 81 | 8,2 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -8 | NC | 8100XX |
| WK673M81AP | 81 | 8,2 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | -8 | NC | 8100XX |
| WK542M81 | 81 | 8,9 :1 | 21 | 29,85 | Wiseco | 2618 | Skirt | NC | -2.4FT | NC | 8100XX |
| WK542M81AP | 81 | 8,9 :1 | 21 | 29,85 | Wiseco AP | 2618 | Skirt | NC | -2.4FT | NC | 8100XX |
| P4-H81-N2R-H13-4 | 81 | 9,6 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | -2,5 | 302 | W8100XX |
| WK566M81 | 81 | 10,5 :1 | 21 | 30,1 | Wiseco | 2618 | Skirt | NC | 5 | NC | 8100XX |
| WK566M81AP | 81 | 10,5 :1 | 21 | 30,1 | Wiseco AP | 2618 | Skirt | NC | 5 | NC | 8100XX |
| WK593M81 | 81 | 11,1 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8100XX |
| WK593M81AP | 81 | 11,1 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8100XX |
| P4-H81-P6-4 | 81 | 11,4 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 5,9 | 246 | W8100XX |
| P4-H81-P7-4 | 81 | 12 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 7 | 241 | W8100XX |
| WK541M8125 | 81,25 | 8,1 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -12 | NC | 8125XX |
| WK541M8125AP | 81,25 | 8,1 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | -12 | NC | 8125XX |
| WK542M8125 | 81,25 | 8,9 :1 | 21 | 29,85 | Wiseco | 2618 | Skirt | NC | -2.4FT | NC | 8125XX |
| WK542M8125AP | 81,25 | 8,9 :1 | 21 | 29,85 | Wiseco AP | 2618 | Skirt | NC | -2.4FT | NC | 8125XX |
| WK566M8125 | 81,25 | 10,5 :1 | 21 | 30,1 | Wiseco | 2618 | Skirt | NC | 5 | NC | 8125XX |
| WK566M8125AP | 81,25 | 10,5 :1 | 21 | 30,1 | Wiseco AP | 2618 | Skirt | NC | 5 | NC | 8125XX |
| WK593M8125 | 81,25 | 11,1 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8125XX |
| WK593M8125AP | 81,25 | 11,1 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8125XX |
| WK541M815 | 81,5 | 8,1 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -12 | NC | 8150XX |
| WK541M815AP | 81,5 | 8,1 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | -12 | NC | 8150XX |
| WK673M815 | 81,5 | 8,2 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -8 | NC | 8150XX |
| WK673M815AP | 81,5 | 8,2 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | -8 | NC | 8150XX |
| WK542M815 | 81,5 | 8,9 :1 | 21 | 29,85 | Wiseco | 2618 | Skirt | NC | -2.4FT | NC | 8150XX |
| WK542M815AP | 81,5 | 8,9 :1 | 21 | 29,85 | Wiseco AP | 2618 | Skirt | NC | -2.4FT | NC | 8150XX |
| P4-H815-N2R-4 | 81,5 | 9,6 :1 | 21 | 30 | Supertech | NC | Crown + Skirt | NC | -2,5 | NC | W8150XX |
| WK566M815 | 81,5 | 10,5 :1 | 21 | 30,1 | Wiseco | 2618 | Skirt | NC | 5 | NC | 8150XX |
| WK566M815AP | 81,5 | 10,5 :1 | 21 | 30,1 | Wiseco AP | 2618 | Skirt | NC | 5 | NC | 8150XX |
| WK593M815 | 81,5 | 11,1 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8150XX |
| WK593M815AP | 81,5 | 11,1 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8150XX |
| P4-H815-P6-4 | 81,5 | 11,4 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 5,7 | 261 | W8150XX |
| P4-H815-P7-4 | 81,5 | 12,1 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 7 | 250 | W8150XX |
| WK541M82 | 82 | 8,1 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -12 | NC | 8200XX |
| WK541M82AP | 82 | 8,1 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | -12 | NC | 8200XX |
| WK673M82 | 82 | 8,2 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -8 | NC | 8200XX |
| WK673M82AP | 82 | 8,2 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | -8 | NC | 8200XX |
| WK542M82 | 82 | 8,9 :1 | 21 | 29,85 | Wiseco | 2618 | Skirt | NC | -2.4FT | NC | 8200XX |
| WK542M82AP | 82 | 8,9 :1 | 21 | 29,85 | Wiseco AP | 2618 | Skirt | NC | -2.4FT | NC | 8200XX |
| P4-H82-N2R-H13-4 | 82 | 9,6 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | -2,5 | 250 | W8200XX |
| WK566M82 | 82 | 10,5 :1 | 21 | 30,1 | Wiseco | 2618 | Skirt | NC | 5 | NC | 8200XX |
| WK566M82AP | 82 | 10,5 :1 | 21 | 30,1 | Wiseco AP | 2618 | Skirt | NC | 5 | NC | 8200XX |
| WK593M82 | 82 | 11,1 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8200XX |
| WK593M82AP | 82 | 11,1 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8200XX |
| P4-H82-P6-4 | 82 | 11,5 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 5,9 | 290 | W8200XX |
| P4-H82-P7-4 | 82 | 12,2 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 7 | 257 | W8200XX |
| P4-H83-P6-4 | 83 | 11,5 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 5,9 | 300 | W8300XX |
| WK649M84 | 84 | 8,4 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -10 | NC | 8400XX |
| P4-H84-N10R-H13-4 | 84 | 9,1 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | -10,3 | 295 | W8400XX |
| WK623M84 | 84 | 9,4 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -2.3FT | NC | 8400XX |
| P4-H84-N2R-H13-4 | 84 | 10,3 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | -2,5 | 295 | W8400XX |
| P4-H84-P1-4 | 84 | 11 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 1,4 | 285 | W8400XX |
| WK594M84 | 84 | 11,5 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8400XX |
| WK594M84AP | 84 | 11,5 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8400XX |
| P4-H84-P5-4 | 84 | 11,9 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 5,5 | 310 | W8400XX |
| WK594M8425 | 84,25 | 11,6 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8425XX |
| WK594M8425AP | 84,25 | 11,6 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8425XX |
| WK649M845 | 84,5 | 8,4 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -10 | NC | 8450XX |
| P4-H845-N10R-H13-4 | 84,5 | 9,2 :1 | 21 | 30 | Supertech | NC | Crown + Skirt | NC | -10,3 | NC | W8450XX |
| WK623M845 | 84,5 | 9,4 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -2.3FT | NC | 8450XX |
| P4-H845-N2R-4 | 84,5 | 10,4 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | -2,5 | 290 | W8450XX |
| P4-H845-P1-4 | 84,5 | 11,5 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 1,4 | 306 | W8450XX |
| WK594M845 | 84,5 | 11,6 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8450XX |
| WK594M845AP | 84,5 | 11,6 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8450XX |
| P4-H845-P5-4 | 84,5 | 12,5 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 5,5 | 310 | W8450XX |
| WK649M85 | 85 | 8,5 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | -10 | NC | 8500XX |
| P4-H85-N10R-H13-4 | 85 | 9,5 :1 | 21 | 30 | Supertech | NC | Crown + Skirt | NC | -10,3 | NC | NC |
| P4-H85-N2R-4 | 85 | 10,5 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | -2,5 | 275 | W8500XX |
| WK594M85 | 85 | 11,7 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8500XX |
| WK594M85AP | 85 | 11,7 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8500XX |
| P4-H85-P5-4 | 85 | 12 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 5,5 | 318 | W8500XX |
| P4-H85-P8-4 | 85 | 13 :1 | 21 | 30 | Supertech | 4032 | Crown + Skirt | NC | 8 | 322 | W8500XX |
| WK594M855 | 85,5 | 11,8 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8550XX |
| WK594M855AP | 85,5 | 11,8 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8550XX |
| WK594M86 | 86 | 12 :1 | 21 | 30 | Wiseco | 2618 | Skirt | NC | 8,3 | NC | 8600XX |
| WK594M86AP | 86 | 12 :1 | 21 | 30 | Wiseco AP | 2618 | Skirt | NC | 8,3 | NC | 8600XX |
Compatibility engine :
| Brand | Model | Chassis | Engine code | Power (ch) | Years |
|---|---|---|---|---|---|
| Acura | Integra LS / GS (2e Gen.) | DA9 / DB1 | B18A1 | 130 | 1990 – 1991 |
| Acura | Integra LS / GS (2e Gen.) | DA9 / DB1 | B18A1 | 140 | 1992 – 1993 |
| Acura | Integra RS / LS (3e Gen.) | DC4 | B18B1 | 142 | 1994 – 1995 |
| Acura | Integra RS / LS / GS (3e Gen.) | DC4 | B18B1 | 140 | 1996 – 2001 |
Manufacturer piston references (OEM):
13101‑PR4‑010 (remplace 13101‑PR4‑000) ; Oversize 0,25 : 13102‑PR4‑010 ; Oversize 0,50 : 13103‑PM7‑000.13010‑P54‑000 ; piston Set (O/S 0,25) : 13020‑P54‑000.Warning : Before installation, please verify the integrity and conformity of each component of the piston kit, as well as the correctness of the assembly in the engine. Any warranty is strictly limited to the parts included in the piston kit.
