The third day of our Week to Wicked 2013 Subaru BRZ project build is in the books and we're moving along at a pretty good clip. After a couple days of chassis, brake, and cosmetic improvements, we've reached an important juncture in the story arc—getting ready for a boost in power scheduled for Day 4. For the build team, that meant wrapping up other sections of the car and laying down more groundwork for an increase in engine output.
We picked up a SPEC Stage 3+ clutch kit and 10-lb. billet aluminum flywheel for our Subie, but first we had to pull out the old unit, which was from a competing aftermarket brand. As you might imagine, dropping the transmission is a fairly involved operation and not for the faint of heart. In the cabin you're disconnecting the shifter and pulling out the center console, while in the engine bay and underneath the car you must unbolt the exhaust from the header back, slave cylinder, starter, and driveshaft. Then the gearbox is ready to unbolt and drop (hopefully on a trans stand, if you have one).
The SPEC Stage 3+ Clutch Kit package includes both release and pilot bearings, as well as a race bolt kit for the clutch. The Stage 3+ clutch features SPEC's high-clamp pressure plate and full-faced carbon-graphite disc. This configuration provides a street-friendly engagement, industry-best wear life, and manageability for different driving environments. The lightweight 10-lb. billet aluminum flywheel features a replaceable diamond ground high-carbon steel friction plate and stepped dowels.
With the drivetrain ready for more power, we turned our attention to breathing and in particular ditching the stock exhaust system for something a little freer flowing. Our friends at GReddy Performance Products came to the rescue with one of its brand-new RS-Ti titanium cat-back exhausts. The beautifully manufactured single-exit setup is a 3-inch straight-through design and boasts an incredible weight savings, coming in at 12 pounds (the OEM exhaust weights 40 pounds). The system comes with all the hardware you need, too.
GReddy also came through with one of its new front lip spoilers for the BRZ. The hard urethane front piece features holes predrilled on the ends to screw right into place and also comes with double-sided tape to secure other sections of the spoiler. The lip extends the front lower edge of the car by some 17mm. Saving the day with a fresh coat of paint on the new bumper addition were our friends at PJ Bonafacio Autobody in La Puente, Ca., who tackled the very last minute request just in time.
The last thing we did today was install new spark plugs for something special coming tomorrow (which we can't really talk about yet). This was our first time doing plugs on an H4 Subie engine, and boy, that sucked. You basically have just a couple inches between the frame rail and the cylinder head to work in - not fun. We did the driver side plugs from under the car and the passenger side plugs from above, and it only took us about 2.5 hours for the four (!) - longest spark plug change EVAR.
Day 3 is done and we are over the hump! Make sure to come back tomorrow for the next phase of the Super Street Week to Wicked/120 Hours Subaru BRZ.
For this build, the official sponsors of the Super Street Week To Wicked Subaru BRZ build, includes: Falken Tires, Konig Wheels, Greddy Performance Products, SPEC Clutch, Covercraft, Energy Suspension, Odyssey Battery, RS-R USA, and Vortech Superchargers
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