 All 1987 350 TPI L98 IROC-Zs required 3.27 gears, J65 rear disc brakes, G80 limited slip differential, and KC4 engine oil cooler.The largest visual change this year was the CHMSL (third brake light) was now mounted inside the rear spoiler instead of on top of the rear hatch (except the base coupe without the spoiler option - on those cars it remained on top of the hatch like the previous year).The Berlinetta was no longer available this year, replaced with a new LT model, while the base Camaro and Z28 continued as before.