SW New Hampshire
Two piece brake rotors have cooling fins that suck air through them. Their weigh reduction and added cooling is well worth the money.Typical data I’ve seen of testing brake ducting is usually a solid 20%+ cooler rotor temps. Obviously many variables at play. But 20% is far from abnormal.
Even the rear brake underpanel tray that that one guy made which would not be nearly as effective as a real front brake duct system saw a 10% difference.
So it’s probably more like 40-100f degree difference on a track depending on conditions, track, and driving style/ability.
Not talking oem pad but maybe a sporty street pad could be stretched with a brake duct and be adequate on the track.
or $250 brake duct paired with 1pc sloted sport street rotor/pad setup could handle some tracking with out drastically increased wear etc... and then prevents spending much more on a BBk/2pc rotor
It’s only $250, it’s not $1,000. They are pretty effective especially considering price.
Ppl with non sport upgrade need to modify dust shield or buy new ones for $370. this is a cheaper option with added benefits.
Not saying everyone should immediately go buy. But for only $250 it’s not useless for anyone/everyone.
The front ducting kit ftom Z1 is kinda cool (pun intended) but the ROI is less than two piece brake rotors, and you should get track pads anyway. The cost in tires and track fees is a lot. Two piece brake rotors and track pads are about the cost of 2 days on the track.
You should probably invest in high performance brakes if your tuned and want to play anyway. Your life rides on your tires & brakes. Not the place to skimp.
I don't know if the brake cooling kit has a downside, like introducing sand and water into your brakes during your daily driving. I don't know how they mount. I'd have to look at the kit mounting.