Corvette C5 & C6 Clutch Kits: McLeod vs ACT Compared

Choosing a C5 & C6 Corvette clutch kit comes down to one question: single-disc or twin-disc? For most 1997–2004 (C5) and 2005–2013 (C6) Corvette owners, the McLeod RXT 1200 Street Twin is the standout upgrade — a street-driveable twin-disc rated to roughly 1,000–1,200 hp that ships with a lightweight aluminum flywheel. But ACT’s twin-disc kits and McLeod’s single-disc options cover everything from a stock-power daily to a boosted LS drag build. Below we compare the best Corvette clutch kits from McLeod and ACT side by side, with real fitment, capacity, and pricing so you can match the right kit to your power level.

Why Upgrade the Clutch on a C5 or C6 Corvette?

The factory C5 and C6 Corvette clutch is a single organic disc engineered for stock power — and stock power on these cars is already substantial. A C5 LS1 makes 345–350 hp, the 2001–2004 Z06 LS6 climbs to 385–405 hp, and the C6 range runs from the 400-hp LS2 up to the 430-hp LS3, the 505-hp Z06 LS7, and the 638-hp ZR1 LS9. Every one of these engines routes torque through a 6-speed manual (Tremec T56 or TR6060) on a 1-1/8 in. x 26-spline input shaft.

Add a cam, headers, a tune, nitrous, or forced induction and the stock disc starts to slip — usually first in the higher gears under load, then everywhere. A performance clutch does three things: it raises clamp load so the disc stops slipping, it adds friction material (or a second disc) to increase torque capacity, and it lets you drop in a lighter flywheel to free up throttle response. At NLP Performance, Corvette clutch kits are one of the most common upgrades our Tampa customers buy right after a cam-and-headers package, because a slipping clutch erases every horsepower you just paid for.

Single-Disc vs Twin-Disc: Which Corvette Clutch Do You Need?

A single-disc clutch uses one friction disc and works best up to roughly 500–600 hp; a twin-disc clutch stacks two thinner discs to nearly double torque capacity while keeping pedal effort manageable. That is the core trade-off. Because a twin-disc spreads the load across two friction surfaces, it can hold 1,000-plus horsepower without the brutally heavy pedal a high-clamp single-disc would need at the same power level.

For a mostly stock or lightly modified C5/C6 — bolt-ons, a tune, maybe a mild cam — a quality single-disc like the McLeod Street Extreme or Super Street Pro is the right, cost-effective call. Once you add boost, a big cam, or plan to launch the car hard at the strip, step up to a twin-disc such as the McLeod RXT 1200 or an ACT twin-disc kit. The twin gives you headroom so you are not back under the car in a year chasing slip.

McLeod vs ACT: How the Two Brands Compare

McLeod and ACT are the two most popular clutch brands for LS-powered Corvettes, and both build excellent kits — they just emphasize different things. McLeod is known for its modular, rebuildable RXT and RST twin-disc designs that deliver a remarkably stock-like pedal and engagement, which is why the RXT lineup dominates street/strip LS builds. ACT leans on race-proven pressure plates with high clamp loads and sprung-hub discs that tame drivetrain chatter, giving you serious holding power at a lower price point.

In short: pick McLeod when you want the smoothest street twin-disc experience and the widest capacity ceiling, and pick ACT when you want twin-disc holding power for the money or a dedicated race setup. Both use the correct 1-1/8 in. x 26-spline LS input and both are covered by a limited manufacturer warranty.

The Best C5 & C6 Corvette Clutch Kits

The RXT 1200 is McLeod’s flagship street twin. Twin ceramic-faced discs give it a rated capacity in the 1,000–1,200 hp range, yet the modular design and included aluminum flywheel keep the pedal light and engagement smooth enough to sit in traffic. If you are building a boosted or high-cam LS Corvette that still sees street miles, this is the one kit that covers you now and after your next power adder.

The value twin-disc. ACT’s HD Street kit brings twin-disc torque capacity with a high-clamp HD pressure plate and sprung-hub organic discs that keep drivetrain rattle in check — and at around $1,350 it undercuts most street twins. It is sized for the higher-torque Z06 and Grand Sport applications, so confirm your exact model on the product page. Right now it also carries an Extra 5% off promo at NLP.

Built for the track. The MaXX XT Race kit steps up clamp load and disc aggressiveness over the HD Street, trading some daily smoothness for maximum grip on a hard launch. If your C5/C6 is a dedicated drag or road-course car making serious torque, this is the ACT twin to run. It carries the same Extra 5% off promo as the HD Street kit.

The best single-disc street upgrade for a C5. The Street Extreme uses a higher-clamp pressure plate and a durable organic disc to hold mild bolt-on and cam builds — think up to roughly 550 hp — while keeping a daily-friendly pedal. At $725 it is the sweet spot for a naturally aspirated C5 that just needs to stop slipping.

The budget-friendly daily upgrade. The Super Street Pro is an organic single-disc kit that restores firm, positive engagement on a near-stock C5 for under $700. One important note straight from the part name: this kit ships without a throw-out bearing, so plan to reuse a good one or add a hydraulic release bearing to your cart.

C5 & C6 Corvette Clutch Kits Compared

Top Pick Pros & Cons

How to Choose Based on Your Power Level

Match the clutch to your build, not just your budget. Under about 450–550 hp on a naturally aspirated C5 or C6, a single-disc McLeod Street Extreme or Super Street Pro is plenty and keeps the daily-driver pedal you want. From roughly 550 hp up to 4-digit builds — superchargers, turbo LS swaps, big nitrous shots — move to a twin-disc so you never chase slip again. The McLeod RXT 1200 is the do-it-all street twin; the ACT HD Street is the value twin; and the ACT MaXX XT Race is for cars that live at the track.

One more consideration: flywheel. Twin-disc kits like the RXT 1200 include a flywheel, but if you choose a single-disc kit you can pair it with a lightweight aluminum flywheel to sharpen throttle response. Not sure which way to go? Our Tampa, FL team fields Corvette clutch questions every day — browse the full clutch and flywheel collection or reach out and we will spec it to your exact power goal.

Installation Notes & What Else You Need

A Corvette clutch job is transmission-out work, so it pays to do it once and do it right. Plan on 6–10 hours in a home garage on a lift or transmission jack, and while you are in there replace the wear items: throw-out (release) bearing, pilot bearing, and inspect the slave cylinder and clutch master. Remember the McLeod Super Street Pro kit does not include a release bearing, so add one. Torque the pressure plate and flywheel bolts to spec, and follow the manufacturer’s break-in — typically 300–500 easy street miles — to properly seat organic discs before you launch the car hard.