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ARP 156-2501 Harmonic Balancers



<p>Today, ARP&rsquo;s product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline and throughout the suspension and frame. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, NASCAR and NHRA drag racing and marine applications.</p>

Part Number

12/03/2033 10:59 PM
Cyber Monday Price


In Stock (10+)

delivery box

Usually delivered within 2 days

No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

ARP 156-2501 Harmonic Balancers

As the crankshaft flexes the damper absorbs incredible amounts of energy. This damper bolt kit will ensure that your balancer is locked into position. It features a 1/4 in. thick wide-area washer and an extra tall 12 point head that accepts a deep socket to eliminate the fear of stripping the head.

Harmonic Balancer Bolt Kit
12Point Head

As the crankshaft flexes and twists, the balancer absorbs incredible amounts of kinetic energy. To ensure that the balancer is locked in position, ARP has developed these ultra strong 200,000 psi bolts that let you exert maximum clamping force. Special features include 1/4 thick, wide area washer and an extra tall 12-point head that accepts a deep socket and eliminates the worry of stripping the head.

Square Drive Balancer Bolts
ARP offers a special version of its rugged 200,000 psi rated balancer bolt that can accept a standard 1/2 drive ratchet or breaker bar to facilitate rotating
the crank assembly.

  • 1/2 square drive forged into bolt head, enabling the rotation
    of an engine with any 1/2 drive tool
  • Made from heat-treated 8740 chrome moly steel with heavyduty
    black oxide finish

Products specifications

Overall Diameter

M12 x 1.50

Fastener Finish

Black oxide

Fastener Material


Fastener Yield Strength (psi)

200,000 psi

Head Style



Sold individually.



Thread Size

12mm x 1.50 RH



Underhead Length (in)

1.880 in.

Washer Included


So far so good. Ordering was seamless.


Great products and great delivery time

Good people

It's what I ordered


Great turnaround time. Product was exactly what as displayed. Great service!!

Fast shipping cheapest I could find, easy to deal with, great product

All was good,except delivery wait was longer than usual and delayed from the 8th to the 10th.

Very good deal and simple buying experience.

Very good prices and good shipping prices. found my parts cheaper then any place else. Thanks to Autoplicity for filling my order #8498 of 4/02/12 quickly and accurately. I will be back.

The item has not been delivered yet. But the email updates are great. And I found this much cheaper than elsewere.

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