GR Yaris Altocumulus's Gen1

At my last track day the standard clutch started slipping. I was actually expecting this, as I'd started to notice something similar to a misfire when applying maximum torque on road 'opportunities' - it was very hard to tell whether it was a spark misfire, traction control intervention or clutch issue (spoiler: it was the clutch starting to go).

I like to think I'm quite easy on the driveline (driving hard while expressing mechanical sympathy is an underrated art!), but the nearly 40,000 kms and 5 track days had taken their toll on the original clutch.

I wanted a clutch that could handle increased power/torque, without being too heavy for daily driving duties. I was originally keen on the Uniclutch Track unit, but after discussion with my mechanic I decided to fit a Uniclutch Sport. This is an organic twin-plate clutch.


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I had fitted a cat back exhaust not too long ago (Fujitsubo Authorize R), which I think sounds fantastic: it has a great note, not too loud and zero drone. I was more than aware that as the clutch was being changed, it would be an opportune time to upgrade the downpipe.

I picked up a Lamspeed 100-cell catted exhaust downpipe and link pipe to fit while the clutch was being changed. There are numerous reports of turbo oil drain lines cracking after fitting aftermarket exhausts. Although the Lamspeed downpipe has a flexible joint, given the ease of access to replace the oil line at the time of clutch replacement, I played it safe and bought a flexible Artec oil drain line to be fitted at the same time.

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I'm looking forward to picking the car up in a few days.

I have a few more track days and sprints scheduled in the next 6 months, I'm hopeful that this clutch will outlast the original's mileage.
 
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