marine68

my iroc has the rpo code j65 brakes. the fronts have a single piston caliper setup, the rear are pbr aluminum calipers. i need to repair the front brakes. the parts guy at o'reillys said the car came with dual piston alum calipers and i should upgrade to these. if i buy these will they fit. the remans are cardone 18-4343/44 and it includes hardware. so is this a easy swap and repair job.

89 Iroc Z

You have to modify the spindle, buy 1LE rotors, and more. Here is a 1LE brake upgrade how-to: http://www.ws6transam.org/1LEbrake.html

If you want to go the brake upgrade route you may want to consider some other options link C4, LS1 brakes.

marine68

thanks for the info, did your iroc come with the australian pbr brakes in the rear when you bought it.

89 Iroc Z

My car came with 11.67" rear with PBR aluminum calipers and 10.50" front with single piston iron caliper. I upgraded to C4 HD 13-inch front brakes. If you are interested in doing so click the link in my signature to my website, I have a full how-to there.

marine68

thanks, i already read your site and it is professionally done. so the auto parts guy is wrong then, i can't install the pbr front calipers without these mods. he did not mention the car needed a 1LE RPO to use these brakes. i guess i'll have to replace the regular calipers then.

JamesC

iTrader: (5)

Unless your car was originally equipped with 1LE fronts, the standard four-wheel disc set-up is Delco-Moraine, single-piston, iron calipers with 10.5" front rotors and PBR, single-piston, alum calipers with 11.7" rear rotors. And, yes, the auto parts fellow is wrong. BTW, all 82-92 four-wheel disc cars are RPO J65, regardless of caliper type or rotor size.

JamesC