# ZR-1 official HP 638!!!!!Also 604 TQ

**URL:** <https://forums.speedlife.net/t/zr-1-official-hp-638-also-604-tq/47384>\
**Category:** NYSpeed Automotive\
**Created:** [April 24, 2008, 10:22pm UTC](https://forums.speedlife.net/t/zr-1-official-hp-638-also-604-tq/47384 "2008-04-24T22:22:24Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![Carnut](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/carnut/32/7590_2.png) [@Carnut](https://forums.speedlife.net/u/Carnut)\
**Post date:** [April 24, 2008, 11:48pm UTC](https://forums.speedlife.net/t/zr-1-official-hp-638-also-604-tq/47384/8 "2008-04-24T23:48:57Z")

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Wow very impressive.

Love them or hate them, GM has some serious R+D into their engines and fuel systems.

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