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Th3Franz 03-30-2010 09:56 PM

Wilwood 4-pot caliper kit
Pad shape is 7420

I bought the Wilwood 4-pot caliper kit from Eric at I wanted to share my impressions and evaluate performance of the kit under the most extreme conditions. :lol:

Teaser so far but the kit is on the car. I will post up with impressions in the coming days as I bed the pads and finish some other projects on the car. The first track event is in a week and a half, followed by Road America on the 17th. Last fall I was hitting 130 mph in the straights there. With the new brakes and more power this year, I hope to hit the mid 130's

I am running Porterfield R4-S pads for street and Performance Friction 01 for track. The main reason I chose the Wilwood kit is the huge availability of different pad compounds. Porterfield and PF are some of the big names in professional racing. I will be running Centric premium and DBA 4000 rotors for street and track, respectively. I flushed the brake system with Amsoil series 600 DOT4 brake fluid.

My previous track setup was Carbotech XP8 with the DBA 4000. I am also going to look into installing brake ducts. I bought an extra set of fog light trim covers to attach duct hose to and route back to the hub area.
CF duct inlets will match the grille

More info to come

Th3Franz 03-30-2010 10:02 PM


Th3Franz 03-30-2010 10:03 PM

photo reserve

theflystyle 03-31-2010 10:18 AM

patiently waiting. as there is a GB currently going on for these

DosRenshos 03-31-2010 06:27 PM

Turn 5 will certainly put some heat into them.

Th3Franz 04-01-2010 11:00 AM

Update: I performed a double bed-in for the street pads (Porterfields) tonight. These pads are great. I pushed them close to their limit to see how fade resistant they are, and I was impressed. When they are at typical stop and go temperatures, they are very quiet and have excellent modulation. The kit definitely gives better pedal feedback than the stock calipers and threshold braking is effortless. It's a shame Porterfield does not make these pads in stock caliper fitment because they are much better than Hawk HPS in almost every way.

We are having a freak heat wave here, but if temperatures get closer to freezing again I'll comment on how the pads perform when they are dead cold.

Overall I'm very pleased with the caliper kit so far and it's what I expected: better pedal feel, improved fade resistance, awesome pad options

LowFast 04-01-2010 01:11 PM

I might have to try the Porterfields next time around, I am not happy at all with the HPS and wilwood combo. I think the wilwoods are a good package but these HPS suck, I am having problems with a "shimmy" that occurs about once a week and basically the only way to get it to go away is the re-bed the pads. Not sure the issue, if the HPS are leaving deposits or what. It is an annoyance. Let us know how the Porterfields do in heavy rain, the hawks seem to loose thier bits for the first split second when driving in heavy rain, which is less than assuring in a panic stop situation.

Th3Franz 04-01-2010 10:54 PM

I ran HPS with the stock rotors during winter and they left deposits. I'm sure the shimmy you are experiencing is from the deposits. If you want better rain performance, slotted rotors can help a lot with that. I did a track day in pouring rain and with slotted rotors and track pads, I had no problems stopping even after long straights.

I cleaned up the car today and snapped some photos. I had to fix a small leak on the brake line fitting that meets the caliper. At first, I wanted to be careful not to torque them too much since they are brass threaded into billet aluminum. All good now though :)

LowFast 04-02-2010 08:18 AM

I am running slotted rotors, but thanks for the info. That seems to back up by belief that the Hawks are just crap, plain and simple. I went with them after reading so many rave reviews, but I guess my expectations are higher than the average joe. Nice pics BTW.

Underdog 04-02-2010 08:39 AM

I love GRP! :wub:

Nice review thus far... I always liked the Wilwood kit, except for the lack of a rear caliper option.

darkside 04-02-2010 12:16 PM

Finally some people that agree that hawk hps are junk, If ur driving miss daisy home there ok, lol. But only about 5% better than factory pads. Last time I got blasted blasphemy for saying hps are junk. I'm glad there people who really drive their Subaru.

LegacyMUN2k6 04-02-2010 12:35 PM

I'll never run hawks.

fonts 04-02-2010 06:56 PM

Certainly interested in the Wilwood kit but think I'll wait until they match a rear caliper for the kit.

Thanks for the pics and review.

LowFast 04-02-2010 08:55 PM

^ You might be waiting a long time as I do not believe they have plans to offer a rear kit, and trust me we have been asking. Truthfully I do not feel the front kit upsets the brake bias of the car, so aside from the sweet looks of having a nice two piston out back I am not sure it would result in much of a performance gain.

Meshanks07 04-02-2010 11:06 PM

RPA performance is currently putting together a front and rear set of wilwoods. Check the group buy forum for some info.

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