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I tried to buy the ZL1 pads, but just ended up filing a credit card dispute with them. I ordered over 4 weeks ago and at the time their website showed that the parts were in-stock. I still haven't recieved them and can't get ZL1 to respond to me via phone or email.

It looks like these tweeter plugs aren't being shipped to the US anymore. Has anyone been able to find another source for them?

I'm running -2.5 degrees up front which clearly isn't enough. This was my front left tire after two track days. I will probably go to -3.0 degrees up front before my next track day.

I don't have any experience with SR-11 pad, but I would advise against the Paragon P3. They were the worst brake pads I have ever owned. The P3 claims to be dual purpose, but they are terrible at everything. They can't handle track duty and they make a lot of noise on the street.

We don't do it because we aren't legally allowed to. Until a car is 25 years old, it is very difficult, if even possible, to legally import a car into the US.

I have the PRL RMM and do get some vibration at idle with the A/C on. It is a little annnoying but definately worth the trade-off IMO. Hardrace recently released their RMM. I haven't seen any reviews on it, but their products tend to have softer bushings that transmit less NVH...

Understood. Thanks for the feedback. Did you notice any difference in coolant temps, or just oil?

Is there any concensus on whether vented spalsh guards are actually effective at reducing coolant temps? PLM has theirs on sale for $250 plus an additional 5% off today, so I'm thinking about pulling the trigger.

I thought this was an interesting question, so I figured it out. Assumptions: The pump hose has 1/3 gallon of 87 octane fuel FL5 fuel tank is 12.4 gallons Results: If you always fill up at 50%, you will have an actual octane rating of 92.68. If you always fill up near empty, you will have an...

You can absolutely take an SI to the track. If you are new to HPDE's you'll have fun in just about anything. However, if you end up getting hooked and want to do a lot of track days, the Type R might actually be more affordable in the long run. It will likely require less modifications and it...

I have the PRL collars. All of the positive reviews are what convinced me to give these a try. I haven't driven all that hard, since the install. I have a track day in a few weeks though. I will come back and ammend my original post if my opinion changes.

I regret the subframe rigid collars. I had a really hard time believing that they would actually do anything, but I grabbed a set on Black Friday. I have had them installed for two weeks now and I can confidently say that they did nothing for the feel of the car. I'm sure they will make it...

I can't wait to hear your thoughts on it after a track day.

I have had the Acuity cable bushings installed for a few months now. I couldn't feel any difference from them. I wouldn't bother with them on a new car. I could see them helping a lot once these cars age and the stock bushings wear out, but when new I don't think they are worth the effort to...

What is your goal for the car? What kind of driving do you primarliy do with it?

I have done some searching but can't find much info on the CSF radiator. It's currently on sale for $629 which is quite a bit cheaper than either PWR offering. From what I gather, no radiator completely solves overheating issues on track, so is ther a reason to go with PWR or CSF? My car is a...

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I have decided to start tracking my car more frequently, so I am upgrading to dedicated track pads. These P3 pads have about 600 street miles and one track day on them. The pads are 15mm thick when new, so they should have ~80-90% life left. Asking $90 shipped.

I like the idea. I'm not sure if the graphs are very useful though. The two issues I see are the large difference in ambient temps and the fact that the car wasn't up to full operating temp at the beginning of the second test.