HotCars. The Rarest Pontiac 455 V8 Engine Ever Produced. Posted: August 12, 2024 | Last updated: April 23, 2025. The 455 V8 was Pontiac's top-of-the-line large displacement engine in its powerful ...

The Pontiac 455 debuted for the 1970 model year with 10.25:1 compression, which is obviously a bit high for an iron-headed pump-gas engine today. When compression ratios began to drop in 1971, the ...

Read about the DCI 455 Pontiac Engine and see pictures of the valvetrain, Ross pistons, lifters, ports, Pontiac manifold, Holly carburetor, and more, inside Popular Hot Rodding Magazine.

Oldsmobile was first with its Rocket 455 engine, and Pontiac and Buick both followed suit ... The stage 2 package was installed by dealers and meant for Super Stock racing. Its upgraded heads ...

The Super Duty was an engine mostly used for racing purposes, but Pontiac looked to use this new 455, which now had a bore of 4.1525 inches with a 4.21-inch stroke.

The engine in question was Pontiac's largest displacement V8, the 455-ci (7.5-liter), which debuted a year earlier in standard and HO (High Output) forms.

But his SD-455, a modern performance car as Pontiac engineers intended, lives on with its -- and their -- legacy untainted. The Specs Engine: 7.5L V-8, 290-310 hp, 390-395 lb-ft ...

This was still a very serviceable muscle car engine. The 455 HO Pontiac V8 from 1971 was listed from the factory jetting a (probably underrated) 335 gross horsepower and 480 lb-ft (651 N⋅m) of ...

Pontiac will be making an attempt to break the current Stock Class land-speed record ... Products and produces in excess of 455 hp@ ... Pontiac Motor Division was established as a performance ...

This 455 couldn't match the Super Duty's performance when stock, as its L75 7.4-liter engine was rated at just 250 horsepower when new. Bring a Trailer Still, the grunt was there, some 370 pound ...

Check out Jon Obrizok 2002 LS1-Powered WS6 Pontiac Trans Am with a LS1, 455 cid block and JE forged Pistons, featured in the 2007 April of GM High-Tech Performance Magazine.