the 97 Firehawk was a rare Firebird that a lot of people might not remember, made by SLP Engineering but sold through Pontiac's official dealer network, that had a special engine (the ZR1 Vette motor)

SLP took Firebird Formulas and fitted them with a range of goodies. Earlier LT1 cars got a lightweight composite hood with functional ram air scoops, plus Corvette cold air induction, which apparently lifted power by 25 horsepower. Later, a Level II Bilstein Sport Suspension Package and Torsen Limited Slip Differential were added, as well as parts to make the Firehawks stand out.

The 1997 models came fitted with the LT4 V8 out of the Corvette Grand Sport, which makes it extra special. The fast-revving LT4 in the Firehawk has 330 horsepower. These engines have reworked ports, increased-flow-rate injectors, a high-lift cam, larger valves, plus the benefit of higher-compression pistons. SLP Engineering managed to get hold of the last 150 of these blueprint units, says Motor Trend, fitting them to a few 30th-anniversary Camaros, and keeping the rest for Firehawks. The fitment of a Borg-Warner six-speed is the cherry on the cake for this '90s modern classic muscle car.

It's worth noting that all 29 LT4 Firebird Firehawks were outfitted with the Six-Speed manual. The same is true for all 100+ Camaros rolling with the LT4 engine that year.

https://www.hotcars.com/rarest-pontiac-firebird-ever-was-built-for-29-lucky-buyers