H.O. explanation? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-26-2003, 02:06 AM   #1
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Default H.O. explanation?

It all started when I saw in the RPO codes here in the BC registry state that the L27 was labeled as an "H.O." design. Who decided that though? GM? What would make it H.O.? Ported manifolds?

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Old 08-26-2003, 03:08 AM   #2
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It would be GM if it was in the RPO...
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Old 08-26-2003, 04:23 AM   #3
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I admit it, it was me. I was bored one day, and well...

'sup Mach? Just wanted to say hi since I've been too busy to fire up IRC lately.
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