JRitt@essex

2024 Bump. We are now shipping our larger front and rear complete AP Racing by Essex Radi-CAL systems!

We have our original 372mm front / 355mm rear kit, and a new, larger 390mm front / 378mm rear kit. Details on the new, larger kits below.

All options here: https://www.essexparts.com/my-vehicl...0Brakes%20(J56)

Front System Benefits

• Saves approximately 9 unsprung lbs. on front end vs. OEM Z06 Iron System
• Drastically reduced spares/running costs and minimal 6 lb. weight penalty vs. OEM Z07 Carbon Ceramic system
• Increased disc diameter to 390mm and thickness to 36mm without significantly increasing weight over our previous 372mm C8 systems
• Championship winning, 72 vane, fully floating, AP Racing J Hook racing discs with 12 attachment points to hat
• Disc metallurgy specifically designed to handle the temps typically seen on track offer a long service life
• Replacement iron disc rings available at an extremely competitive replacement price compared to OEM discs, especially carbon
• Available disc burnishing service ensures that your kit arrives ready to be installed and driven hard immediately
• Anti-knockback/anti-rattle disc attachment hardware
• 6-Piston AP Racing Radi-CAL calipers are the stiffest, lightest, and most technologically advanced calipers available at any price
• Features AP Racing CP9668 Radi-CAL calipers with 25mm (1 inch) thick pads extreme durability!
• Simple pad change with two bolts vs. the OEM spring clip that is retained by multiple pins which are tedious to align and secure
• Ventilated, domed back, stainless steel pistons keep heat out of the brake fluid and provide an ultra-firm pedal
• Mitigation of pad knockback via anti-knockback springs behind the caliper pistons
• Anodized or ENP (Electroless Nickel Plated) caliper finishes that are resistant to wear and deterioration at elevated temperatures
• Stainless steel caliper hardware for a long caliper service life under frequent pad change conditions
• High temperature, low drag seals that will hold up to track temps= less rebuilding and longer service life
• No dust boots to burn up
• Lifetime professional caliper rebuilding support by Essex (at a fee)- pull off your calipers, send them to us, we clean, inspect, and rebuild them
• Highest quality, Spiegler stainless steel brake lines with clear sheath that reduces compliance over OEM rubber design

Rear System Benefits

• Saves approximately 10-12 unsprung lbs. on rear end (depending on caliper) vs. OEM Z06 Iron System
• Drastically reduced spares/running costs and minimal ~6 lb. weight penalty vs. OEM Z07 Carbon Ceramic system
• Increased disc diameter to 378mm and thickness to 34mm without significantly increasing weight over our previous 355mm C8 systems
• Championship winning, 72 vane, fully floating, AP Racing J Hook racing discs with 12 attachment points to hat
• 6-Piston AP Racing Radi-CAL calipers are the stiffest, lightest, and most technologically advanced calipers available at any price
• CP9669 Radi-CAL caliper option features 25mm (1 inch) thick pads extreme durability!
• Disc metallurgy specifically designed to handle the temps typically seen on track offer a long service life
• Replacement iron disc rings available at an extremely competitive replacement price compared to OEM discs, especially carbon
• Available disc burnishing service ensures that your kit arrives ready to be installed and driven hard immediately
• Anti-knockback/anti-rattle disc attachment hardware
• Commonly available brake pad shapes with either 18mm thick (CP9661 caliper) or 25mm (1 inch) thick pads in the wider CP9669
• Simple pad change with two bolts vs. the OEM spring clip that is retained by multiple pins which are tedious to align and secure
• Ventilated, domed back, stainless steel pistons keep heat out of the brake fluid and provide an ultra-firm pedal
• Mitigation of pad knockback via anti-knockback springs behind the caliper pistons
• Anodized or ENP (Electroless Nickel Plated) caliper finishes that are resistant to wear and deterioration at elevated temperatures
• Stainless steel caliper hardware for a long caliper service life under frequent pad change conditions
• High temperature, low drag seals that will hold up to track temps= less rebuilding and longer service life
• No dust boots to burn up
• Highest quality, Spiegler stainless steel brake lines with clear sheath that reduces compliance over OEM rubber design

OEM front pad thickness vs. AP Racing CP9668 pad thickness.





Size comparison...Front OEM 398mm Carbon Ceramic disc, Essex 390mm front disc, and OEM 370mm front iron disc.

ZRacerLE

Thanks for the reminder of how beautiful those nickel plated calipers are.

RapidC84B

What was the point of the smaller kit?

JRitt@essex

We have a number of these out 'in the wild' on tracks now. Here's the first review we received from a customer:

"I've run the C8 Z06Z07 (J57) Essex AP Racing Brake Kit for both front and rear brakes for three track events so far and its performance is superb. There is tremendous stopping ability and modulation of the braking force is excellent. There is absolutely no brake fade. The kit is fully compatible with the stock braking system and no faults or warnings have appeared. The brake pad and rotor wear is phenomenal; many times less wear than I have experienced on other slower, but similar weight cars with other track pads. Fitment and finish, especially of the ENP (Electroless Nickel Plated) calipers is of the highest quality and the appearance of the kit on the car is eye catching. The brakes clear with the factory carbon fiber wheels as well as Forgeline 19" SS1R 10X13 ET25 and 19X11 ET38 wheels. The rear parking brake is fully integrated and works exactly as from the factory. While there is a small weight penalty over the factory carbon ceramic brake weight, in my opinion, this is greatly and positively offset by the cost effectiveness of the Essex AP Racing iron brakes and I cannot discern any negative difference in either lap time or braking performance over the carbon ceramic brakes because of that weight. The carbon ceramic brakes are basically dustless while the Essex AP Racing iron brakes do generate some amount of dust as expected."

JRitt@essex

The smaller kit can fit inside 18" wheels.

RapidC84B

They look absolutely awesome... when you guys are doing swaps do you use line stops at the hard line? Or do you have a way to plug the banjo end? I used to have some Wilwoods adapted to AN line ends that made it easy to plug when removing a caliper so fluid doesn't drip, curious if there's a "kit" for these for clean/easy servicing?

JRitt@essex

Thanks! All of our Spiegler brake lines in our kits come with little black rubber covers for the line ends. You can pop those on the hard line to stop the dreaded drip. Also, when our calipers are delivered, they have a little yellow plug in the caliper inlet port. You can take that and screw it into the end of the brake line to stop the fluid from coming out of the caliper.

RapidC84B

Gotcha... it'd be nice to have a banjo end plug of some type so you can service the calipers w/o touching the hose to hard line connection each time. Just a thought.

JRitt@essex

A good hack for that is to put a penny on either side of the banjo fitting and then lock them in place with vice grips or a ratcheting wood clamp. Trying to put anything inside the banjo as a plug is so difficult because of the inner groove and how it is designed to function.

JRitt@essex

Here are the weight charts for our kits vs. the OEM and Carbon Ceramic setups:

The weight of our smaller 372mm/355mm setup is almost identical to the OEM carbon ceramic brakes. Compared to the OEM iron Z06 system, our smaller four-wheel system drops approximately 34 unsprung lbs.