ERA 575 - Rear Brake Caliper Upgrade

frankym · #1 (**permalink**) 01-05-2025, 03:55 AM

Guys,

One question the new owner is inquiring about ERA575 is potentially upgrading the rear calipers to Wilwoods to match the fronts that I replaced 2 years ago. When I concluded my research for replacing the front calipers, I purchased the following from Summit Racing:

Wilwood Front Calipers (Part # 120-11136)
and Wilwood Pads ( Part # 15Q-6829K)

These were a perfect substitute for the stock front brake system and work very well.

On the rear, my rear calipers are the original Sierras and work fine. The fronts were fine as well but as I recall there was a problem with one of the bleeder nipples, which led me to the decision to upgrade the fronts. I'm not sure if the new owner will really want to make the change but I thought I'd reach out to my fellow CC members for a recommendation.

Has anyone done an upgrade to Wilwood calipers in the rear on their ERA? I have the "big brake" upgrade from ERA so I'm looking for a recommendation on which part numbers for Wilwood calipers would work well in my application.

I'm Sure Claes (new owner) will be joining CC soon if not already a member.

Thank you all.

Frank

P.S. I did search the forum to see if I could find this info but mostly only data about how the Sierra calipers work great and were on the ERA car that won a 0-100-0 competition. So hopefully this post helps anyone else looking to replace their Front calipers on their ERA as I did and successfully found the appropriate front calipers/pads from Wilwood.

Snake2998 · #2 (**permalink**) 01-05-2025, 07:31 AM

I would contact Wilwood for advice with as much info regarding current brakes as possible - alternatively try ERA

Grubby · #3 (**permalink**) 01-05-2025, 08:47 AM

Current ERAs use 4th generation Camaro rear brakes on the ERA rear. They were also used on Corvettes. I am quite sure Wilwood has something that is a bolt on.

I am not sure on 575. That would have been built before the 4th generation Camaro.

Call Bob at ERA, he will be able to answer your question.

John

strictlypersonl · #4 (**permalink**) 01-07-2025, 05:25 AM

Chassis 575 is before we offered the outboard-braked rear suspension so he probably has the Jag rear (and brakes).
Years ago, there was someone who offered a Wilwood conversion (caliper and vented rotor) for the inboard Jag but it was complicated and expensive. About $1500 in the '80s or '90s. It was one of of the inspirations for us to build our own design with outboard brakes.

strictlypersonl · #5 (**permalink**) 01-07-2025, 05:27 AM

Chassis 575 is before we offered the outboard-braked rear suspension so he probably has the Jag rear (and brakes).
Years ago, there was someone who offered a Wilwood conversion (caliper and vented rotor) for the inboard Jag but it was complicated and expensive. About $1500 in the '80s or '90s. It was one of of the inspirations for us to build our own design with outboard brakes.

ERA174 · #6 (**permalink**) 01-07-2025, 06:33 AM

The pictures on BAT for the recent sale of ERA575 show the outboard braked rear assembly. I have no personal knowledge of this ERA, appears it was upgraded at some later date.

strictlypersonl · #7 (**permalink**) 01-07-2025, 11:09 AM

Quote:

Originally Posted by ERA174

The pictures on BAT for the recent sale of ERA575 show the outboard braked rear assembly. I have no personal knowledge of this ERA, appears it was upgraded at some later date.

You are correct. The earliest chassis that was compatible is 565. Boy, that was a long time ago...

Unfortunately there is no easy upgrade path that fits in a 15" wheel.

cycleguy55 · #8 (**permalink**) 01-08-2025, 03:49 PM

Quote:

Originally Posted by strictlypersonl

You are correct. The earliest chassis that was compatible is 565. Boy, that was a long time ago...

Unfortunately there is no easy upgrade path that fits in a 15" wheel.

The only rear brake Wilwood kit I see on their website for 4th generation Camaros requires 17" or larger wheels, while ERA 575 currently has 15" wheels.