GM’s CRAZIEST and BIGGEST V8 ENGINES ever made | You didn't know about!

BIGGEST V8 ENGINES Ever Built By GM
What defines the weirdest GM engines? Is it unconventional design, massive size, or the sheer audacity of their performance? GM’s history is filled with engines that broke the mold, from the Buick 455, a lightweight big block with torque to spare, to the Pontiac 455, a powerhouse that combined muscle and smoothness. And who could forget the GMC 637, a 10.4-liter V8 so colossal it powered fire trucks and buses?
Then there’s the ZZ632, the ultimate crate engine delivering a mind-blowing 1,004 horsepower and 876 lb-ft of torque—on pump gas! GM’s engineering genius didn’t stop at raw power; engines like the 60-degree V8 GMC 637 showcased innovation by adapting V6 architecture into a monster V8.
From drag strips to muscle car icons like the Firebird Trans Am and GTO, these engines made history. Their massive displacement and cutting-edge designs pushed the boundaries of automotive engineering, earning them a place among the biggest GM engines ever created.
Which engine would you drop into your dream build? Or do you know another GM masterpiece that deserves the spotlight? Share your thoughts, and don’t forget to like, comment, and subscribe to keep the conversation alive...

01:15 GMC 637
03:31 LSX454
05:13 Buick 455
07:04 ZZ632
09:02 Pontiac 455
10:58 Chevy 572
12:50 Oldsmobile 455
14:27 Cadillac 500 V8
16:02 Cadillac 472
17:53 Chevrolet ZZ502

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