RPO Code help

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Jul 13, 2022 | 10:06 AM

Dillon14

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Newbie

Joined: Jul 2022

Posts: 4

RPO Code help

I have an RPO code on my 1986 IROC that is C4B and what I find says; "Performance Package Engine Upgrade." Is this correct and if yes, what does the upgrade consist of?
Thanks

Jul 13, 2022 | 07:30 PM

Y2Keglide

4th Gear Member

Joined: Dec 2008

Posts: 2,247

From: Yacolt,WA

Might be C48
https://www.thirdgen.org/forums/hist...option-ya.html

Interesting,on this page C4B is ????: Chevy Camaro RPO Codes

Jul 13, 2022 | 07:37 PM

Dillon14

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Newbie

Joined: Jul 2022

Posts: 4

Definitely C4B. Just don’t know.

Jul 14, 2022 | 05:36 AM

Everett#2390

4th Gear Member

Joined: Oct 2012

Posts: 2,595

From: Va. Beach, VA

C49 - Rear Window Defogger http://<a href="http://www.chevy-cam...amaro.com)</a>

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