Your clutch is one of the few driveline components you can feel and it can become a very personal choice. The exertion required to move the pedal, along with the engagement point and feel are all easily perceived. For most enthusiasts, we want the softest, smoothest engaging clutch that is able to hold whatever power level you’re making. Though, as power increases, typically so does the harshness of engagement. While the engine for our Project M-Track3r was out, we felt like it would be a good time to install a new clutch. We turned to SPEC Clutch andx the Stage 2+ clutch kit (PN SB663FHS) and steel flywheel (PN SB64S).
Project M-Track3r makes 400 rwhp through its ESS/Vortech supercharged stock engine. Being something that’s going to spend a lot of time on the street and the road course, the clutch needed to stand up to the rigors of both environments. Since we are not creating a ton of power, we didn’t feel like a twin-disc clutch was needed and a single setup would suffice. With our engine back together, we enlisted the help of Formula Drift champion Michael Essa at Essa Autosport to help us install the clutch kit onto our completed E46 S54 long-block.
“The Stage 2+ with enhanced hybrid is very popular with those who want the smoothest possible engagement in a high torque application,” explained David Norton of SPEC Clutch. “With a capacity just shy of 540 lb-ft, the hybrid fiber and carbon graphite full-faced disc provides a smooth, manageable engagement from a stop and a more progressive high speed engagement, making it driveline-friendly.”
Billet pressure plates come standard on E46 clutches to keep the rotating assembly as light as possible. SPEC touts that it provides the highest level of safety versus cast iron while producing a friendly pedal requirement. This clutch kit is good for any combination of street and competition environments.
We have seen a 10-whp gain from the S54 flywheel – David Norton, SPEC Clutch
Installing SPEC’s flywheel and clutch is as simple as an OEM replacement. They include new bolts, pilot bearing and slave cylinder. We really like SPEC’s billet bearing housing for the clutch release bearing.