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243 heads?

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Old

Mar 5, 2010 | 09:43 PM

#1

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From: nj

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243 heads?

what years corvettes had them?
thanks

Old

Mar 6, 2010 | 03:27 AM

#2

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The Z06's had them and so did the LS2 GTO's

Old

Mar 6, 2010 | 03:50 AM

#3

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anything with an LS6 or an LS2 had them. This includes '02-'04 Z06's. '05-'07 C6's. Also the '05 and '06 GTO's had them. Finally, I believe the CTS-V from 04-06? had them also. I could be wrong on the CTS-V but I am sure on the Vette and GTO, I have owned both.

Old

Mar 6, 2010 | 06:54 AM

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2007+ 4.8L & 5.3L GM Trucks/SUVs have them also. Along with #799s which are the same as a #243

Old

Mar 6, 2010 | 09:44 AM

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Are all of the heads the same no matter what year, model, car they were on? I keep seeing some with sodium filled valves, yellow springs... Is that factory or aftermarket?

Old

Mar 6, 2010 | 10:00 AM

#6

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The sodium filled valves came on the 01-04 Z06 (LS6), and 04-06 CTS-V (LS6). The 05 vette and 05 GTO started coming with 243s but NOT with sodium valves so they redline about 500rpm lower.

Old

Mar 6, 2010 | 07:13 PM

#7

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SDPC sells them for $445 each.

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Old

Mar 6, 2010 | 11:49 PM

#8

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From: nj

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thanks for the info

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Old

Mar 6, 2010 | 11:55 PM

#9

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Also about the springs. Obviously the yellow ones are easy to spot but the non yellow stock LS6/LS2 springs are the same spring (good to .550 lift and the same pressure).

My LS6 CTSV has just regular looking springs (no markings) and I've recently tested different color springs off of various 243s all have the same spring pressures at 1.8" (installed height) and 1.25" (max lift).

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243, heads, lift, max, springs, yellow

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