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Topic: Plugs for the ZZ4 engine

in Forum: C3 Engines

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Plugs for the ZZ4 engine

Posted: 2/25/09 10:26am Message 1 of 4
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DaveM
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Flanders, NJ - USA
Joined: 1/27/2004
Posts: 2553
Vette(s): 1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.
Can anyone tell me what plugs they have in thier ZZ4 crate motor? Mine are AC Delco # MR43LTS, but I'm not sure that's correct. GM Performance does not list what plugs should be in there. I went to a dealer and he contacted GM Performance and could not get a good number, WTF?
They came up with FR5LS, but they are different, mine has a tapered seat and the FR5LS has a square shoulder with a washer.
Help!!
Dave
DaveM2009-02-25 10:26:48


 

Lifetime Member #116
Dave's '82

   

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Plugs for the ZZ4 engine

Posted: 2/25/09 6:51pm Message 2 of 4
spielman5
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ANCHORAGE, AK - USA
Joined: 10/12/2004
Posts: 2193
Vette(s): 1965-327 coupe, 1968-small block coupe, 1969-427, 1971-454 coupe and currently a 1976-ZZ4 coupe reborn again,and hotter than ever.. Add a 1996 CE LT-4 for backup
Dave, my ZZ4 came with AC MR43LTS plugs, this is what I currently run..Terry




   "I Love all Corvettes! LifeTime Member #60..Terry"

Plugs for the ZZ4 engine

Posted: 2/25/09 9:25pm Message 3 of 4
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DaveM
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Flanders, NJ - USA
Joined: 1/27/2004
Posts: 2553
Vette(s): 1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.
Thanks Terry.


 

Lifetime Member #116
Dave's '82

   

Plugs for the ZZ4 engine

Posted: 2/25/09 9:42pm Message 4 of 4
VetteCountry
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Belvidere, IL - USA
Joined: 10/24/2004
Posts: 438
Vette(s): 1977 Black T-Top ZZ4 5Sp 16in Wheels
Hi Dave! those are the correct plug for a ZZ4. I was told at the chevy garage they are a marine plug! Not cheap, had to order, they don't stock.           Dick


in Forum: C3 Engines


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