Holley Performance 21-152 Engine Timing Cover
Holley Performance 21-152 Engine Timing Cover
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Holley Performance 21-152 Engine Timing Cover

5 stars out of 6 reviews
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6 ratings
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Key item features

  • Vortec Compatibility: Designed as an upgrade for 1996-up Vortec Small Block Chevy engines, replacing several GM part numbers including 10244600 and 12523972.
  • Application Versatility: Available for both EFI applications with crank sensor provisions and carbureted applications without crank sensor provisions.
  • Enhanced Sealing: Features an over-molded FKM oil seal, which helps prevent the seal from spinning out at high temperatures.
  • Integrated Indicator: Includes a timing indicator cast directly into the cover, intended for use with 8-inch Vortec and other popular aftermarket balancers.
  • Comprehensive Kit: Comes with a high-quality gasket, corrosion-resistant E-coated hardware, and dowel pins for installation.
  • Finish Options: Offered in two distinct finishes: Natural Cast and Satin Black.
  • Water Pump Accommodation: Designed to accommodate both stock and various aftermarket water pumps.
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Current price is $82.49
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Columbus, 43215
Arrives by Tue, Apr 7
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Sold and shipped by SuperShops
4.407665505226481 stars out of 5, based on 287 seller reviews(4.4)
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5 out of 5 stars
stars6 ratings5 reviews
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Showing 1-3 of 5 reviews

Nov 28, 2025
Anthony
5 out of 5 stars review

Verified Purchase

Holley Quality

nice quality,, i like that all the bolts get used unlike the platic one from the factory. great product from holley

Incentivized Review
Helpful?3HNXZFB743ZC720090938
Feb 9, 2019
JKW7
5 out of 5 stars review

Finally!

Finally someone came out with an affordable timing cover to replace that horrible plastic cover. I have not installed this yet but it is identical to the plastic one and does not omit the two upper corner bolts which I like as well. I love having an aluminum cover that is affordable.

Review from jegs.com
Helpful?3HNXZFB743ZC720090938
Apr 13, 2023
Wiggles
5 out of 5 stars review

Holly timing cover.

Haven't used it yet. It's still in the box and product looks good . Hopefully the front seal is good. It's not blue. Any seal or gasket that's blue will leak guaranteed and this one looks like it could be decent. Nothing like OEM.

Review from jegs.com
Helpful?3HNXZFB743ZC720090938