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Ships within 48 hours · Estimated delivery Sep 17 - Sep 22
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Description
ATI LSA Balancer | 21.5% OverdriveATI LSA 21. 5% Overdriven Harmonic Balancer Boost Upgrade When it comes to upgrading the LSA Supercharged Engines the most important part is getting the correct boost combination for your application. Calculating the right boost for your application depends on multiple variants including engine cubic inch, extractor diameter, camshaft etc. ATI Performance Products have been an industry leader in harmonic balancer engineering for all applications such
ATI LSA 21.5% Overdriven Harmonic Balancer | Boost UpgradeWhen it comes to upgrading the LSA Supercharged Engines the most important part is getting the correct boost combination for your application.
Calculating the right boost for your application depends on multiple variants including engine cubic inch, extractor diameter, camshaft etc.
ATI Performance Products have been an industry leader in harmonic balancer engineering for all applications such as street, drag racing & Nascar since day one!
The trusted industry leaders providing the highest quality dampeners on the market.
This package increases supercharger rpm from 16,900 @ 6500rpm to 20,500 @ 6500rpm increasing pulley ratio from 2.6 to 3.2
*Based off standard top pulley
ATI LSA 21.5% Overdriven Harmonic Balancer Boost Upgrade Kit Includes
- ATI Harmonic Balancer Dampener;
- ATI 21.5% Overdriven Balancer Pulley;
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
Great item
Size: 9 Holes
Works great Would be nice to have another peg to make sure it stays in line. Just used a drill bit of the same size.
Worth the investment
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Reviewed in the United States on March 4, 2026
★★★★★ 5
Game-Changer for Clean, Accurate Shelf Pin Holes!
This shelf pin jig absolutely delivered on everything I needed — the ease of use was fantastic right out of the box. Once I got the layout aligned, drilling was quick and precise. The accuracy is impressive, with clean, straight holes every time, and the included bits worked like a charm. The design is clever, compact, and durable — the aluminum plate feels premium and makes it easy to keep things straight. I love the versatility too; switching between 5mm and 1/4" bits was fast, and the guide holes are clearly labeled. The size is ideal for cabinets, bookcases, and even tighter spaces where a bulky jig wouldn’t fit. For anyone needing quick, repeatable shelf pin drilling, this jig speeds up the use and keeps your project moving fast without compromising quality. If you're doing any custom shelving or cabinet work, this is a must-have tool that saves time and eliminates guesswork.
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Reviewed in the United States on May 13, 2025
★★★★★ 4
Works well for DIY
Worked well for building bookshelf. Wish it maybe had som little pads on the back as some times it would slide a bit, but if I tightened it more it would dent the wood slightly. Overall very easy to use and worked well for its intended use.
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Reviewed in the United States on January 18, 2026
★★★★★ 5
Solid thick aluminum construction
Size: 9 Holes
Very well made, thick aluminum construction and fully customizable.
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Reviewed in the United States on March 13, 2026
★★★★★ 5
Good addition to my jig collection!!!
Size: 9 Holes
It works great! Would be better if it had a Brad style drill bit instead of the ones that came with it.
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Reviewed in the United States on April 9, 2026