Q: What's the difference between the '95s and '96s?

A: Dual catalytic converters became standard on all Z28s, Formulas, and Trans Ams. This raised the advertised HP up to 285 from 275 for all such cars. The oil cooler (KC4) was dropped altogether. Recyclable cooper/lead bearings replace cadmium/lead bearings. Low-resistance ignition wires were designed to improve idle quality and cold-start performance. A redesigned ignition coil has half of the primary inductance as the previous coil allowing the primary current to "pour in" much quicker for much improved output at higher RPMs. Revised pistons used a new positive-twist top ring that improved the piston-to-cylinder seal and reduced blow-by emissions at high speeds. The pushrods were no longer hardened as they were in previous years. The exhaust manifolds got tri-layered stainless steel gaskets for improved durability and reduced leaks. The biggest change was that of the on-board computer. 1996 was the first year of OBD-II ECM technology to better diagnoses engine problems. This was good for reliability, but bad for some modifications in that some heavy modifications to the engine could result in a Service Engine Soon light. OBD-II also required oxygen sensors just before and after the catalytic converter for before and after measurements. Although the ones after the converter really only measure the performance of those before it.

Physically there's not much different. The exhaust tips on the Pontiacs changed from the dual-circles to single oval outlets on each side. The year brought a number of new packages. The Buick 3800 3.8L V6 was the only engine in the base Camaro and Firebird. There was also the return of the Ram-Air Pontiac (originally debuted on the late '60s GTOs). This was part of the WS6 performance package. It's just like the Firehawk except the openings on the hood are a little more forward. The package had a freer-flowing exhaust, tighter suspension (32mm front sway bar, 62 Nm front springs, 23-30 Nm variable-rate rear springs, and new valved shocks), and 17" 5-spoke wheels. HP was rated 305. SLP made the WS6 modifications at their plant after the cars left GM's factory.

Other new options included a remote, factory installed, 12-disc compact disc changer (U1S), content theft alarm requiring keyless entry (UA6), 5-spoke chrome wheels (P05). The base Firebird and Camaro models could get a sport package (Y87) with a posi rear, rear discs, 3.42 gearing in the A4, exhaust pipes/tips on both sides, and sport steering ratio. It required the 235/55 16 inch tires (QBC) though. Interior colors available on all cars were graphite, taupe (tan), and red (leather only). A new exterior color of red-orange metallic replaced medium red. As for the 1LE option, it came with A/C for the first time which was standard on all Z28s and Formulas.