VAC Motorsports - Engine Components / ATI Harmonic Dampers

ARP Harmonic Damper Bolt Set for Toyota/BMW B58

Sun, 8 Feb 2026 12:44:24 GMT

ARP Harmonic Damper Bolt Set for Toyota/BMW B58
Buy Now: $129.95

The factory BMW harmonic damper bolts used on the B58 engine are torque-to-yield (TTY), one-time-use fasteners designed for stock power levels. While sufficient for OEM output, these grade-10 bolts can become a weak point when engine loads increase--especially in higher-boost or performance-driven applications.

Under elevated power and torsional stress, OEM damper bolts have been observed to lose clamping force, stretch unevenly, or fail outright, potentially leading to harmonic damper movement, improper load distribution, and in severe cases, crankshaft or engine damage. For anyone pushing beyond factory power levels, the stock hardware simply isn't engineered with enough margin.

The ARP Harmonic Damper Bolt Kit is the proven solution.

Manufactured in the USA to ARP's exacting standards, these high-strength bolts deliver precise, repeatable clamping force without relying on torque-to-yield deformation. The result is consistent preload across all fasteners, improved harmonic damper retention, and dramatically increased reliability under high RPM and high-boost conditions.

Trusted throughout the motorsports and performance engine-building world, ARP hardware is the gold standard for builders who refuse to gamble with critical rotating-assembly components.

Key Features & Benefits

Designed specifically for BMW B58 engines
Eliminates torque-to-yield limitations of OEM bolts
Provides even, repeatable torque load across all fasteners
Reduces risk of damper movement, bolt loosening, or failure
Ideal for tuned, high-boost, and performance applications
Manufactured in the USA to ARP's industry-leading specifications

Kit Includes

(4) ARP Harmonic Damper Bolts

Engine Compatibility

BMW B58
Toyota B58 applications

If you're increasing power, reliability at the crankshaft is non-negotiable. The ARP Harmonic Damper Bolt Kit is a small upgrade that protects one of the most critical components in your engine--and it's exactly where experienced builders refuse to cut corners.

Visit ATI Harmonic Dampers to see additional products in this category.

ARP Crank Damper Stud Kit, BMW S54

Tue, 27 Jan 2026 15:25:59 GMT

ARP Crank Damper Stud Kit, BMW S54
Buy Now: $129.95

ARP Crank Damper Stud Kit - BMW S54

Secure your harmonic damper the right way.

High-RPM BMW S54 engines demand absolute reliability at the front of the crankshaft. The ARP Crank Damper Stud Kit for BMW S54 replaces factory hardware with premium ARP fasteners to deliver superior clamping force, improved load distribution, and long-term durability under aggressive driving, track use, or race conditions.

Designed specifically for the BMW S54 platform, this stud kit ensures the crank damper remains securely fastened--reducing the risk of fastener fatigue, loosening, or thread damage in high-stress environments.

Why Upgrade to ARP Studs?

Increased clamping strength compared to OEM bolts
More consistent and repeatable torque values
Improved reliability for high-RPM and track-driven engines
Proven fastener technology trusted in professional motorsports

Precision Check Ball Design

This kit includes 5/16" steel check balls, which are installed into the threaded crankshaft holes before the studs. These check balls act as positive depth stops, limiting how far the studs can thread into the crankshaft.

By controlling stud depth, the check balls:

Ensure proper and consistent thread engagement
Prevent bottoming-out of the studs in the crankshaft
Reduce stress concentration at the end of the threads
Provide a smooth radius between the stud and bore for improved load distribution

This design helps protect the crankshaft threads while promoting accurate torque application and long-term reliability.

What's Included

(4) ARP 2000 Studs - M12 x 1.5mm x 4.800"
(4) ARP 12mm Nuts
(4) 5/16" Steel Check Balls

Applications

BMW S54 engines
Ideal for performance street builds, track cars, and race engines

Recommended Installation

Install the check balls into the crankshaft threads prior to installing the studs. Follow ARP lubrication guidelines and torque the nuts to 112 ft-lbs per ARP specifications. Proper check ball placement is critical to achieving correct stud depth and clamp load.

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Genuine BMW Harmonic Damper, BMW B58

Wed, 16 Nov 2022 13:36:01 GMT

Genuine BMW Harmonic Damper, BMW B58
Buy Now: $769.95

This OEM Harmonic Damper bolts directly to your B58 crankshaft and replaces your factory damper.

Replaces OEM part number 11238650741.

Looking for an even more effective solution to unstable crankshaft harmonic vibration? Upgrade your damper to the VAC Motorsports Harmonic Damper by ATI.

Visit ATI Harmonic Dampers to see additional products in this category.

Genuine BMW Harmonic Damper, BMW S55

Wed, 16 Nov 2022 13:15:51 GMT

Genuine BMW Harmonic Damper, BMW S55
Buy Now: $769.95

This OEM Harmonic Damper bolts directly to your S55 crankshaft and replaces your factory damper.

Replaces OEM part number 11237853850.

Looking for an even more effective solution to unstable crankshaft harmonic vibration? Upgrade your damper to the VAC Motorsports Harmonic Damper by ATI.

Visit ATI Harmonic Dampers to see additional products in this category.

Genuine BMW Harmonic Damper, BMW S54

Wed, 16 Nov 2022 11:44:52 GMT

Genuine BMW Harmonic Damper, BMW S54
Buy Now: $1,679.95

This OEM Harmonic Damper bolts directly to your S54 crankshaft and replaces your factory damper.

Replaces OEM part numbers 11237834425 and 11237830475.

Looking for an even more effective solution to unstable crankshaft harmonic vibration? Upgrade your damper to the VAC Motorsports Harmonic Damper by ATI.

Visit ATI Harmonic Dampers to see additional products in this category.

Genuine BMW Harmonic Damper, BMW M50/M52/S50/S52

Wed, 16 Nov 2022 08:15:40 GMT

Genuine BMW Harmonic Damper, BMW M50/M52/S50/S52
Buy Now: $484.95

This OEM Harmonic Damper bolts directly to your M50/M52/S50/S52 crankshaft and replaces your factory damper.

Replaces OEM part number 11231738620.

Looking for an even more effective solution to unstable crankshaft harmonic vibration? Upgrade your damper to the VAC Motorsports Harmonic Damper by ATI.

Visit ATI Harmonic Dampers to see additional products in this category.

Genuine BMW Harmonic Damper, BMW N54

Wed, 16 Nov 2022 07:31:35 GMT

Genuine BMW Harmonic Damper, BMW N54
Buy Now: $614.95

This OEM Harmonic Damper bolts directly to your N54 crankshaft and replaces your factory damper.

Replaces OEM part numbers 11227558083 and 11347832285.

Looking for an even more effective solution to unstable crankshaft harmonic vibration? Upgrade your damper to the VAC Motorsports Harmonic Damper by ATI.

Visit ATI Harmonic Dampers to see additional products in this category.

VAC Motorsports AC Pulley by ATI, BMW M50/M52/S50/S52/M52TU/M54

Tue, 23 Mar 2021 08:43:03 GMT

VAC Motorsports AC Pulley by ATI, BMW M50/M52/S50/S52/M52TU/M54
Buy Now: $129.95

If you are planning on keeping your Air Conditioning system in your street or track car, then you will need to combine our AC Pulley with the ATI Harmonic Damper.

Includes Hardware.

Visit ATI Harmonic Dampers to see additional products in this category.

VAC Motorsports Harmonic Damper by ATI, BMW S14

Wed, 13 Jan 2021 15:32:56 GMT

VAC Motorsports Harmonic Damper by ATI, BMW S14
Buy Now: ~~$699.95~~ $699.95

Due to space limitations, the design of this damper will overdrive your components (waterpump, power steering, and alternator) by approximately 10-13%. We highly reccomend using our underdrive pulleys when using the ATI S14 Damper.

The VAC/ATI Design and Development Team brings harmonic control to the BMW S14 engine.

Controlling the harmonic resonance of the BMW S14 engine is highly important as RPMs rise, but the ideal configuration of the 4-cylinder motor makes even the most experienced engine builders overlook some fundamental principles of engine harmonics that can be destructive.
Harmonics destroy these motors by causing extensive oil pump and crankshaft damage, but the addition of VAC’s Harmonic Damper eliminates the unstable crankshaft harmonic vibrations that cause internal engine wear. By eliminating harmonic vibrations, your S14 engine will be able to produce more horsepower and torque with increased reliability.
The VAC/ATI Harmonic Damper is made with an integral pulley, eliminating the need for the additional pulley other models require.
Exceeds SFI 18.1 Safety Certification
Eliminates problems with lightweight clutch and flywheel assemblies
Controls destructive harmonic forces
Reduces instances of bearing wear, accessory failure and oil pump failure
Includes lightweight VAC Billet Crankshaft Pulley
Made in USA
Compatible with our VAC S14 Crank Trigger Kit
ATI Performance Products, Inc. is located in Baltimore, MD, and specializes in producing and maintaining high performance products for street and track applications. Over the years ATI has earned a reputation for its cutting edge technology, attention to detail and rigorous testing under race conditions. We are proud to have them as an exclusive partner in these BMW applications

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VAC ATI Damper, BMW/Toyota B58

Fri, 24 Jul 2020 08:06:06 GMT

VAC ATI Damper, BMW/Toyota B58
Buy Now: $409.99

ATI Performance Products, Inc. is proud to introduce its 10% underdriven Super Damper for the 2020+ Toyota Supra and 2016+ BMW B58 3.0L engine family for street and high performance racing applications. The new aluminum-shell, steel-hub damper (Part # 918352) is a direct fit replacement for OEM units (Toyota Part # 13470-WAA04 & BMW Part # 11238650741) and is better capable of handling a wider variety of driving habits that Supra and BMW owners will put their new cars through. The new 10% underdrive version is a nice compliment to the OEM size Super Damper (#918573) and 21% underdrive version (#918351) that have been previously available.

OEM dampers are optimally tuned to a narrow band of perceived normal driving conditions and do not perform well outside of those limits. The ATI Super Damper can handle any engine speeds and driving conditions that get thrown at it to better protect your engine. ATI Super Dampers provide balanced dampening of torsional crankshaft vibrations through all RPM ranges and exceed SFI 18.1 Safety Certification for competition use. It's no surprise that they are the crankshaft damper preferred around the globe by the best engine builders. The ATI Super Damper can save you more than just money if you need to replaced your expensive factory damper!

The Super Damper fits the following Toyota & BMW 3.0L applications and possibly others:

'20 & up - Toyota Supra 3.0L
'19-'23 - BMW Z4
'23-'24 - BMW M2
'17-'23 - BMW M240i, M240i xDrive
'16-'18 - BMW 340i, 340i xDrive, 340i GT xDrive
'20-'22 - BMW 340i, 340i xDrive
'17-'20 - BMW 440i, 440i xDrive, 440i xDrive Gran Coupe, 440i Gran Coupe
'17-'20 - BMW 540i, 540i xDrive
'18-'19 - BMW 640i xDrive GT
'16-'22 - BMW 740i, 740i xDrive
'20-'24 - BMW 840i, 840i xDrive, 840i xDrive Gran Coupe, 840i Gran Coupe
'18-'22 - BMW X3
'19-'22 - BMW X4
'19-'23 - BMW X5
'20-'22 - BMW X6
'19-'22 - BMW X7

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