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ARP 190-2501 Harmonic Balancer Bolt Kit Square Drive - 12-Point

(Pontiac GTO 1967-73, Firebird 1967-71, 1974-75, 1977-79, Grand Prix 1967-71, 1976-77, Grand Am 1973-74, LeMans 1968-77 + 9 more models)

Part of: ARP Harmonic Balancer Bolt Kit Square Drive

Other options in this family: ARP 147-2501 ARP 156-2502 ARP 251-2501 ARP 156-2501

Manufacturer

Picture for manufacturer ARP

Part Number

190-2501
8 reviews
Sale Price

$23.44

In Stock (10+)

delivery box

Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 190-2501 harmonic balancer bolt kit is engineered to withstand the extreme forces generated as the crankshaft flexes and twists during engine operation. These ultra-strong bolts are rated at 200,000 psi tensile strength, allowing you to apply maximum clamping force to securely lock the harmonic balancer in position.

Key Features:

  • 12-point head design accepts deep sockets and prevents stripping
  • Integrated 1/2-inch square drive forged into bolt head enables engine rotation with any standard 1/2-inch drive ratchet or breaker bar
  • Manufactured from heat-treated 8740 chrome moly steel for superior strength and durability
  • Heavy-duty black oxide finish provides corrosion resistance
  • Includes 1/4-inch thick wide-area washer for optimal load distribution
  • Extra tall head design provides better tool engagement

This square drive version combines the security of a high-strength balancer bolt with the convenience of manual engine rotation, making it ideal for engine assembly, timing procedures, and maintenance work.

Products specifications

Fits

Pontiac GTO 1967-73, Firebird 1967-71, 1974-75, 1977-79, Grand Prix 1967-71, 1976-77, Grand Am 1973-74, LeMans 1968-77, Catalina 1967-74, 1976-79, Tempest 1968-70, Ventura 1975, Grandville 1971, Executive 1967-70, Grand LeMans 1975-77 + 3 more models

Overall Diameter

5/8-18

Fastener Finish

Black oxide

Fastener Material

Chromemoly

Fastener Yield Strength (psi)

200,000 psi

Head Style

12-point

Quantity

Sold individually.

Socket

5/8

Thread Size

5/8-18 RH in.

UHL

1.58

Underhead Length (in)

1.580 in.

Washer Included

Yes

Great experience so far

Super Fast! Website was easy to user, multiple different payment options (Amazon, Paypal, Credit Card) Got a notification of shipment within 1 hour!

Great service, awesome prices, incredibly fast shipping. A++ I would absolutely suggest you to my friends and family

quick response and unbelievably CHEAP prices.

Excellent service, quick ship. An easy transaction.

Ordered a set of 5 steel wheels, distributor messed up and only sent me 4. 5th wheel is taking a good couple weeks to arrive due to the distributor messing up the shipment. Autoplicity did make things right and I can honestly say now I would recommend them.

- Updated review -<br>Autoplicity.com contacted me after my original review and admitted to making a mistake with my order. They have refunded my shipping and I am happy now.<br><br>- Original review -<br>After 18 days the part finally arrived. The filter appears to have been sent directly from K&N, but I ordered on the 20th of June, yet the packing date that K&N Engineering Inc. shows is July 3rd.

Very pleased with Autoplicity's fast and efficient service. The part I ordered fit and looked great. Will definitely consider Autoplicity for future orders. Thanks.

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