ARP cylinder head stud kit
BMW 3.0L 24V F80, M3, M4 (S55B30)
N55 Engine Block, you MUST Drill and Tap the (4) 9mm holes in the engine block to make them 11mm holes. This way all the engine block holes are 11mm, and fit ALL (14) 11mm Studs.

Product detailed specification
Manufacturer: FCP Engineering
Model: FCPRHB144353622
Profile: H-beam
C to C: 144.3mm
Big end diameter: 53.6mm
Pin diameter: 22mm
Quantity: 6 pcs., 12 pcs. ARP2000 3/8" bolts
Made of: forged steel 4340 EN24er
Advertised horsepower rating: 1000HP (6 cylinder)
Advertised RPM rating: 9000RPM
BMW 135i E82/E88, M135i F20, M235i F22/F23, 335i E90/E91/E92/E93, 335i F30/F31, 435i F32/F33/F36, 535i F10/F11, 640i F12/F13, 740i F01, X1 E84, X3 F25, X4 F26, X5 E70, X5 F15, X6 E71, X6 F16, 335 GT F34, 535 GT F07
Fits aftermarket pistons


Spring data:
Seat pressure - 75lbs @ 36.50mm
Open (lift) pressure - 155lbs @ 10.00mm
Spring coil bind - 23.20mm
Max lift - 12mm
Rate - 8 lbs./mm
Wide end spring outer diameter - 24.40mm
Wide end spring inner diameter - 17.60mm
Narrow end spring outer diameter - 21.00mm
Narrow end spring inner diameter - 14.30mm
Kit includes:
Single springs - 24 pcs. SPR-FE20N54-BE
Rretainers - 12 pcs. RET-BMN54-TI (5mm)
Retainers - 12 pcs. RET-BMN54-TE (6mm)

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Product detailed specification |
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Model number |
BMIVN-1055S |
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Head diameter |
32.00mm |
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Stem diameter |
4.97mm |
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Length |
104.9mm |
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Material |
Black nitrided stainless steel |
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Fits for |
BMW E60, E90, E91, E92, E93, E82, E88, E89, X6, Z4, F01 - 3.0 (N55B30, S55B30) |

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Product detailed specification |
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Model number |
BMEVI-1055S-HS |
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Head diameter |
28.00mm |
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Stem diameter |
5.96mm |
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Length |
112.9mm |
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Material |
Sodium filled |
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Fits for |
BMW E90, E91, E92, E93, E82, E88, E89, X6, Z4, F01 - 3.0 (N55B30, S55B30) |

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Product detailed specification |
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Bore size |
84.00mm |
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Stroke |
89.60mm |
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JE Pistons compression ratio (CR) |
9.5:1 |
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OEM compression ratio (CR) |
10.2:1 |
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Dome volume (CC) |
-14.7cm3 |
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Compression height (CH) |
32.40mm |
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Pin diameter |
22mm |
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Features |
Accepts Turbo and Nitrous; coated FSR skirt |
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Fits for |
BMW - 3.0 24V Turbo (N55B30) |


