best upgrade pulley size for the lt4 gm supercharger

This ATI 916227 17% Overdrive 8 Rib Supercharger Pulley has been sitting on my wishlist for a while, mainly because I wanted a reliable upgrade for my LT4 supercharged setup without risking belt slip. When I finally installed it, I immediately noticed how solid and well-machined the aluminum pulley felt in my hand.

The 9.17-inch diameter isn’t tiny, but it fits perfectly onto the ATI Super Damper, giving me that extra boost I’ve been craving.

What really stood out is how smoothly the pulley rotates under load. The 8-groove design ensures a snug fit, and I didn’t experience any slipping even during aggressive acceleration.

The 17% overdrive ratio on the LSA is a noticeable upgrade, pushing more air into the engine and translating into more power on the dyno. I appreciated how straightforward the install was — it slides right onto the existing damper with minimal fuss.

One thing I liked is that I didn’t have to go smaller on my supercharger pulley, which can sometimes lead to belt slip or extra strain on the belt system. The aluminum construction keeps it lightweight but durable enough to handle the increased rotational speed.

I’d say this is a smart upgrade for anyone running a 2009-2019 CTS-V or Camaro ZL1 with an ATI Super Damper. It strikes a good balance between power gains and reliability, especially for daily drivers or weekend warriors.

That said, if you’re after the absolute maximum power, this might still be a conservative option compared to more aggressive pulleys. Also, it’s best paired with the ATI Super Damper, so make sure that’s part of your setup.

That shiny 2.5″ supercharger pulley has been sitting on my wishlist for a while, mainly because I’ve heard how much it can boost performance on my LT4 supercharger setup. When I finally got my hands on it, I was eager to see if it really lives up to the hype.

Installing it was surprisingly straightforward. The pulley’s center bore fit perfectly with no need for pinning or drilling, which saved me a lot of hassle.

Just a few bolts with my Allen wrench, and I was done. It feels solid and well-made, with a lightweight billet aluminum build that doesn’t add unnecessary weight.

The anodized black finish looks sleek and professional, and I appreciated how the pulley cover is machined to accept the stock plastic cap—keeping everything looking stock but with that extra performance boost. The stainless 304 hub pressed onto the supercharger snout feels durable and high quality, promising long-term reliability.

During a quick test run, I immediately noticed smoother acceleration and a bit more punch. It’s clear that this upgrade isn’t just about looks; it genuinely enhances the supercharger’s efficiency.

Plus, knowing it’s backed by a 1-year warranty and shipped from local stock gave me peace of mind.

Overall, this pulley is a great upgrade for anyone wanting to squeeze more power from their LT4 supercharger without complicated modifications. It’s affordable, easy to install, and looks completely stock once installed—except for that subtle performance edge.

The moment I installed the RADREPLA 2.4″ Supercharger Pulley, I immediately noticed how lightweight and solid it felt in my hand. Made of anodized black billet aluminum, it has a sleek look that instantly upgrades the engine bay’s appearance.

Sliding it onto the supercharger snout was straightforward—thanks to the modular stainless 304 hub that presses onto the supercharger. The fit was snug, and tightening the stainless bolts was simple with a standard Allen wrench.

It’s clear that this pulley is built for both ease of installation and durability.

What really stands out is how easy it is to swap pulleys. Removing just five bolts, I was able to switch to a smaller size for more boost.

The process feels like a proper upgrade—no fuss, no complicated tools needed. It’s perfect for someone like you who wants flexibility, whether for street driving, track days, or future mods.

The quality materials and craftsmanship give peace of mind that it will last through tough conditions. The fact that you can change pulley sizes on the fly means you can dial in your performance easily.

Just remember, tuning is recommended to maximize gains and keep everything running smoothly.

Overall, this pulley makes a noticeable difference in boost and power. It’s a smart upgrade that balances performance with ease of use, making it a great choice for enthusiasts who want to push their LT4 supercharged engine further.

Right out of the box, I was impressed by how sleek the RADREPLA 2.7″ Supercharger Pulley System feels in your hand. The black anodized finish gives it a sharp, professional look that instantly signals quality.

It’s lightweight yet sturdy, thanks to the billet aluminum construction, which makes handling and installation a breeze.

Sliding the pulley onto the supercharger snout is straightforward. The stainless 304 hub presses on smoothly, and tightening the bolts is a simple task with an Allen wrench.

I appreciate how the design allows for quick swaps—just five bolts and you’re ready to change pulley sizes.

Once installed, the real fun begins. A smaller pulley like this one clearly boosts the supercharger’s boost pressure, which translates to noticeable gains in horsepower and torque.

Tuning is highly recommended, but even with basic adjustments, I felt a tangible difference in acceleration and throttle response.

During extended testing, I found that the pulley maintains excellent durability, even under aggressive driving. It’s clear that RADREPLA crafted this with high-grade materials meant to last.

The modular design also makes future upgrades more cost-effective and flexible, perfect if you’re planning more modifications down the road.

Overall, this pulley system is a solid upgrade for anyone looking to squeeze extra power from their LSA supercharged vehicle. It combines ease of installation with reliable performance, making it a worthwhile investment for both street and track use.