a four-barrel carburetor and . Power brakes became standard on V8 models this year. The Camaro's popularity was soaring. Sales totals jumped significantly for 1976, the best year yet for the second generation, and were to improve even more dramatically as the decade progressed. 1977 The Z28 was reintroduced, as a model and not an RPO, to the buying public in the spring of 1977 as a 1977½ in response to increasing sales of Pontiac's Trans Am, which sold over 46,000 units in 1976 and accounted for half of all Firebird sales that year.The revived Z28 was powered by a V8 with four-barrel carburetor producing ( with California emissions equipment), with most cars sold equipped with air conditioning and an automatic transmission. The engine no longer came with the 4-bolt main bearing engine block, forged crank, forged pistons, big valve heads, and performance camshaft that had been part of the RPO Z28 Special Performance Package, the engine that had been shared with the Corvette LT-1 and L82 top-performance 350 engines from 1970 to 1974. The LM1 engine was the most powerful Camaro engine and only available in the Z28 model. The engine came with better tuned intake and exhaust, shared with most all Chevy passenger cars. The cars were also available with a Borg-Warner Super T-10 4-speed manual transmission. Intermittent wipers were offered as a new option and the I-6 became the standard engine for both the sport coupe and luxury LT models. The continued as the base V8 and the four-barrel that was optional on sport coupe and LT models was uprated to . Due to General Motors' engine sharing program, the 350 CID Chevrolet engine was also used by Oldsmobile. This year the optional "Bumperettes" were offered for the LT models (front bumper only) and were mandatory for all Camaro models sold in the state of California. Output set a record for the second-generation Camaro, with 218,853 coupes produced. The Camaro outsold Ford's Mustang for the first time ever. For 1977 Z28 production was around 13,000 cars with a 350 engine. 1978 For the 1978 model year, the Camaro featured a new body colored urethane front and rear bumpers. Z28s featured a non-functioning hood scoop with outlining decal around the intake. The taillights were updated to include amber turn signals. Sales topped all previous years with 272,631 units, of which 54,907 were the Z28 model. Available models included