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We did it, again! Lightest 2 Piece Aluminum Hat STi Rotors
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Old 19 Nov 2004, 03:03 AM   #1 (permalink)
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We did it, again! Lightest 2 Piece Aluminum Hat STi Rotors

For those unfamiliar with our prototype lightweight two aluminum hat rotors, see this thread:


In that thread, we introduced a prototype set of lightweight aluminum hat rotors that shed 30 lbs of weight over stock. This not only reduced rotational mass (freeing up torque), but also reduced unsprung weight improving handling (and track times). Only 10 sets were made and sold to those who actually raced competitively. Selling price was a scary $2600.

We have now come up with a new lightweight aluminum front aluminum hat rotor setup that offers another 10 lbs of weight savings over the set we came out with above when used with the rear rotor setup of the kit above.

Stock front rotors weigh 22+ lbs.
First set of Prototype Front Rotors (w/modified washers and nuts) weigh 17.7 lbs.
Second set of Prototype Front Rotors weigh 12.7 lbs.

Giving a 10 lb weight reduction per front corner.

Now for pics:

Stock Fronts:

First Prototypes of the Front Rotors:

Second Prototypes of the Front Rotors (after hard mileage) on that second scale:

Given that the weight is off the front end, we can expect significantly reduced understeer, something built into the STi from the factory.

Unlike the above kit, these will be available for use with the 04 & 05 STis.

Expected Wear Characteristics: Excellent (We are told these can take multiple beatings well)
Brake Friction Coefficient: 29% greater than the stock Brembos (with increased friction, we can expect shorter stopping distances)
Two piece aluminum hat design: Significantly increased ability to dissipate heat (We are told that warping this rotor on the STi is next to impossible)

There will be a street and race pad offered as well as braided lines.

In a few weeks, the first completed test version will be available for us to abuse. We expect to have it available in early 2005. We are told nothing on the market will compare.

Once we have verified that there is truth to these claims, we will be offering 20 sets as part of a group buy. If the group buy does not materialize, then these will never be available due to the tooling and production costs. I do not have pricing as of yet, but as I learn of more details I will post them here.

The technology and materials used are both patented and not used in any of the rotors available OEM or aftermarket.

By upgrading to this or another two piece aluminum hat setup, you will notice not only improved handling but also increased performance and acceleration. Improved braking will depend on a number of things including pad materials, rotor material, clamping force, and line pressure. We are told these rotors achieve all three of the above. Unfortunately, the price when finalized will reflect this.

It has come to our attention that many people want increased performance, but are concerned about maintaining their factory engine, tranny, and driveline warranty. This is possibly one way to gain performance without sacrificing your warranty, while also gaining in handling and braking.

King of Imports, LLC

My direct line is 310-383-3623
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