BMW Internal Engine Parts for BMW F80 M3 S55 3.0L

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Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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Race Series High Performance Connecting Rod Bearing Set - BMW N52/N54...
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ACL - Corporate Logo
T#:567606
Part#: 6B1584H-STD
In Stock
$ 193.99 USD
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$ 193.99 USD
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Introducing the BMW N52, N54, N55, and S55 Race Series High-Performance Con Rod Bearing Set by Automotive Components Limited. Elevate your BMW's performance with these precision-engineered con rod bearings, specifically designed for performance BMW engines.

Key Features:

Premium Quality: Crafted with the utmost precision and durability, this con rod bearing set ensures high performance and reliability for your BMW. Race Series Design: Engineered to meet the demands of race applications, these bearings are well-suited for high-performance driving scenarios. Enhanced Engine Protection: The bearings provide essential protection for your engine components, ensuring their longevity even under extreme conditions. Perfect Fit: Designed to seamlessly fit BMW N52, N54, N55, and S55 engines found in many newer BMWs, these bearings are a direct replacement for your stock components. Improved Performance: Experience enhanced engine performance and responsiveness, making it ideal for racing and high-performance driving. Upgrade your BMW with the Race Series High-Performance Con Rod Bearing Set from Automotive Components Limited. Enhance your vehicle's performance and enjoy peace of mind knowing your engine is protected by top-quality components.

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ACL 3.0L Standard Size Main Bearing Set BMW N52/N54/N55/S55B30 ...
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ACL - Corporate Logo
T#:25706124
Part#: ACL7M1397H-STD
In Stock
$ 256.99 USD
Free Shipping on orders $49 and up
Supertech Single Groove Exhaust Valve - Priced Each
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Supertech - Corporate Logo
T#:21472889
Part#: BMEVI-1055S-HS
Ships in 6 Business Days
$ 55.99 USD
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Single Groove sodium filled exhaust valves for high performance builds Head Diam: 28mm (std) Material: Inconel-Nimonic / Sodium Filled Groove Type: Single Groove Length: 112.9mm Stem Diam: 5.96mm
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5mm Single Groove Valve Keeper - Set Of 24
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Supertech - Corporate Logo
T#:21604314
Part#: KPR-5.0-7S-24
In Stock
$ 72.99 USD
Free Shipping on orders $49 and up
Two required per valve, for use with certain supertech valves 5.0mm single groove

Supertech Forged Pistons - Set Of 6
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Supertech - Corporate Logo
T#:21604329
Part#: P6-BMN55-84-T-6
In Stock
$ 984.99

This product was last offered at the strikethrough price on
05-21-2026

$ 904.99 USD
Limited Qty Sale
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$ 984.99

This product was last offered at the strikethrough price on
05-21-2026

$ 904.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
​Supertech forged pistons are a great choice for performance engine builds! Bore: 84.00mm Over Size: STD Comp Ratio: 10.2:1 Dome dish: -10.4 Head CCs: 37cc Comp Height: 32.40mm Stroke: 89.60mm Skirt style: Slipper Design Rod Length: 141.35mm Pin Diam: 22mm Material: 4032 Application: All Motor / Turbo Ring part number: R84-GNH8400 (MUST BE PURCHASED SEPARATELY)
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Supertech Single Groove Intake Valve - Set Of 12
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Supertech - Corporate Logo
T#:14783498
Part#: BMIVN-1055S-12
Ships in 6 Business Days
$ 310.99 USD
Free Shipping on orders $49 and up
Head Diam: 32mm (std) Material: Stainless Steel 21-4N Groove Type: Single Groove Length: 104.9mm Stem Diam: 4.97mm

Supertech Titanium Valve Retainers - Intake - Set Of 12
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Supertech - Corporate Logo
T#:21604322
Part#: RET-BMN54-TI-12
Ships in 7 Business Days
$ 197.99 USD
Free Shipping on orders $49 and up
7 Degree - 5mm valve stem - Single or Tripe Groove Valves
Supertech Titanium Valve Retainers - Exhaust - Set Of 12
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Supertech - Corporate Logo
T#:21604321
Part#: RET-BMN54-TE-12
Ships in 8 Business Days
$ 197.99 USD
Free Shipping on orders $49 and up
7 Degree - 6mm valve stem - Single or Tripe Groove Valves

Supertech Single Groove Exhaust Valve - Set Of 12
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Supertech - Corporate Logo
T#:14816646
Part#: BMEVI-1055S-HS-1
Ships in 5 Business Days
$ 660.99 USD
Free Shipping on orders $49 and up
Single Groove sodium filled exhaust valve set for high performance builds Head Diam: 28mm (std) Material: Inconel-Nimonic / Sodium Filled Groove Type: Single Groove Length: 112.9mm Stem Diam: 5.96mm
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Performance Dual Valve Spring Kit with Steel Retainers - Set Of 24 ...
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Supertech - Corporate Logo
T#:21604308
Part#: SPRKFE20N54BE
Ships in 5 Business Days
$ 965.99 USD
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$ 965.99 USD
Free Shipping
Supertech has the high performance valvetrain components you need to take your build to the next level. ​Can be used with factory valve stem seals and keepers. InnSpr.OD: 21mm InnSpr.ID: 14.2mm Seat Pressure: 75 @ 36.5 Open Pressure: 155 @ 10 Max Lift: 12mm Coil Bind: 23.2mm Rate: 8 Kit spring: SPR-FE20BE Kit spring qty: 24 Retainer: RET-BMN54-TI (5mm) / RET-BMN54-TE (6mm) OutSpr.OD: 24.4mm OutSpr.ID: 17.6mm Retainer qty: 24
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Conical Spring Kit - Set Of 24
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Supertech - Corporate Logo
T#:21604309
Part#: SPRKFE20N54BE2
Ships on Jul 24, 2026
$ 965.99 USD
Free Shipping on orders $49 and up
Supertech has the high performance valvetrain components you need to take your build to the next level. ​​Can be used with factory valve stem seals and keepers. InnSpr.OD: 21mm InnSpr.ID: 14.2mm Seat Pressure: 88 @ 36.5 Open Pressure: 160 @ 10 Max Lift: 12mm Coil Bind: 23.2mm Rate: 7.25 Kit spring: SPR-FE20BE-2 Kit spring qty: 24 Retainer: RET-BMN54-TI (5mm) / RET-BMN54-TE (6mm) OutSpr.OD: 24.4mm OutSpr.ID: 17.6mm Retainer qty: 24
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Inline 6 RACE Series Bearing Shells - Set
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ACL - Corporate Logo
T#:637190
Part#: 6B1584H-.025
Special Order: No Guaranteed ETA
$ 261.99 USD
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$ 261.99 USD
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Upgraded Bearing Shells for you N55/N54/S55B30!


Performance Conical Valve Spring - Sold Each
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Supertech - Corporate Logo
T#:21472894
Part#: SPR-FE20BE
In Stock
$ 19.99

This product was last offered at the strikethrough price on
05-03-2026

$ 18.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 19.99

This product was last offered at the strikethrough price on
05-03-2026

$ 18.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Supertech has the high performance valvetrain components you need to take your build to the next level. Seat Pressure: 75 @ 37 Open Pressure: 155 @ 10 Max Lift: 12.2mm Coil Bind: 23.20mm Rate: 8 OutSpr.ID: 17.60mm InnSpr.OD: 21.00mm InnSpr.ID: 14.20mm
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Forged Connecting Rods - Sold Each
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Supertech - Corporate Logo
T#:21604327
Part#: CR-BMN55-H144.35
In Stock
$ 198.99

This product was last offered at the strikethrough price on
05-03-2026

$ 184.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 198.99

This product was last offered at the strikethrough price on
05-03-2026

$ 184.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
​Supertech forged rods are a great choice for performance engine builds! These rods come with ARP 2000 hardware and are designed for high powered N55/S55 applications. H-Beam design Forged 4340 alloy Center to center: 144.35mm Be bore: 53.6mm Be width: 20.88 Pe bore: 22mm full float Pe width: 20.88mm tapered ARP 2000 - 3/8" x 1.600" bolts
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Supertech Titanium Valve Retainers - Exhaust - Sold Each
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Supertech - Corporate Logo
T#:21604320
Part#: RET-BMN54-TE
Ships in 9 Business Days
$ 16.99 USD
Free Shipping on orders $49 and up
7 Degree - 6mm valve stem - Single or Tripe Groove Valves

Supertech Single Groove Intake Valve - Priced Each
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Supertech - Corporate Logo
T#:14783497
Part#: BMIVN-1055S
Ships in 9 Business Days
$ 25.99 USD
Free Shipping on orders $49 and up
Head Diam: 32mm (std) Material: Stainless Steel 21-4N Groove Type: Single Groove Length: 104.9mm Stem Diam: 4.97mm

Supertech Titanium Valve Retainers - Intake - Sold Each
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Supertech - Corporate Logo
T#:21604319
Part#: RET-BMN54-TI
Ships in 9 Business Days
$ 16.99 USD
Free Shipping on orders $49 and up
7 Degree - 5mm valve stem - Single or Tripe Groove Valves
Performance Conical Valve Spring - Set Of 24
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Supertech - Corporate Logo
T#:21604324
Part#: SPR-FE20BE-24
Ships in 9 Business Days
$ 471.99 USD
Free Shipping on orders $49 and up
$ 471.99 USD
Free Shipping on orders $49 and up
Supertech has the high performance valvetrain components you need to take your build to the next level. Seat Pressure: 75 @ 37 Open Pressure: 155 @ 10 Max Lift: 12.2mm Coil Bind: 23.20mm Rate: 8 OutSpr.ID: 17.60mm InnSpr.OD: 21.00mm InnSpr.ID: 14.20mm
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Performance Conical Valve Spring - Set Of 24
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Supertech - Corporate Logo
T#:21604325
Part#: SPR-FE20BE-2-24
Ships in 9 Business Days
$ 494.99 USD
Free Shipping on orders $49 and up
Supertech has the high performance valvetrain components you need to take your build to the next level. Seat Pressure: 84 @ 37 Open Pressure: 157 @ 10 Max Lift: 12.2mm Coil Bind: 23.20mm OutSpr.ID: 17.60mm InnSpr.OD: 21.00mm InnSpr.ID: 14.20mm Rate: 7.25
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Performance Conical Valve Spring - Sold Each
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Supertech - Corporate Logo
T#:21604306
Part#: SPR-FE20BE-2
Ships in 9 Business Days
$ 20.99 USD
Free Shipping on orders $49 and up
Supertech has the high performance valvetrain components you need to take your build to the next level. Seat Pressure: 84 @ 37 Open Pressure: 157 @ 10 Max Lift: 12.2mm Coil Bind: 23.20mm OutSpr.ID: 17.60mm InnSpr.OD: 21.00mm InnSpr.ID: 14.20mm Rate: 7.25
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SuperTech High Performance Valve Spring Kit - 88lbs - BMW N55 S55 ...
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Supertech - Corporate Logo
T#:14783500
Part#: SUP-HPVSK-S55-88
Ships on Jul 23, 2026
$ 1,099.99 USD
Free Shipping on orders $49 and up

5mm Single Groove Valve Keeper - Priced Each
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Supertech - Corporate Logo
T#:21604312
Part#: KPR-5.0-7S
Back Ordered
$ 3.99 USD
Free Shipping on orders $49 and up
Two required per valve, necessary use with certain supertech valves 5.0mm single groove