seanof30306
Member
SOLD ... NEW Ported GMPP ZZ3/ZZ4 "Corvette" heads PN 10185087
SOLD ... These are new, in the box, and have never been mounted on an engine. I bought these heads in 2004, but have never used them. They have been correctly stored standing on-end ever since.
ZZ3 and early ZZ4 heads had the "Orange" valve springs these heads have; later ZZ4 heads had different springs and retainers.
10185087 is the revised casting of the aluminum L-98 heads that came on '88 and later Corvettes with the "D-shaped" exhaust port. They have 58cc combustion chambers, 163cc intake runners, 3/8" screw-in studs and 1.94/1.50 valves, and angled spark plugs.
They flowed well in stock form, but these particular heads have been ported by Reher Morrison Racing Engines and now flow the following:
Stock ZZ4:
.300: 160 (int), 125 (ex)
.400: 186 (int), 150 (ex)
.450: 191 (int), 163 (ex)
.500: 196 (int), 170 (ex)
.600: 199 (int), 175 (ex)
After Porting:
.300: 175 (int), 128 (ex)
.400: 206 (int), 154 (ex)
.450: 212 (int), 167 (ex)
.500: 215 (int), 172 (ex)
.600: 215 (int), 177 (ex)
I have the flow sheet showing this.
Scoggin-Dickey sells the unported version of these heads for 552.95, each, plus shipping.
http://sdparts.com/details/gm-factor...parts/10185087
Pace Performance sells the unported versions for 609.95, each, plus shipping.
http://paceperformance.com/index.asp...D&ProdID=22850
I'll take 850 for the pair of these, shipped, with insurance, to anywhere in the lower 48 states.
email me at seanof30306@yahoo.com
SOLD ... These are new, in the box, and have never been mounted on an engine. I bought these heads in 2004, but have never used them. They have been correctly stored standing on-end ever since.
ZZ3 and early ZZ4 heads had the "Orange" valve springs these heads have; later ZZ4 heads had different springs and retainers.
10185087 is the revised casting of the aluminum L-98 heads that came on '88 and later Corvettes with the "D-shaped" exhaust port. They have 58cc combustion chambers, 163cc intake runners, 3/8" screw-in studs and 1.94/1.50 valves, and angled spark plugs.
They flowed well in stock form, but these particular heads have been ported by Reher Morrison Racing Engines and now flow the following:
Stock ZZ4:
.300: 160 (int), 125 (ex)
.400: 186 (int), 150 (ex)
.450: 191 (int), 163 (ex)
.500: 196 (int), 170 (ex)
.600: 199 (int), 175 (ex)
After Porting:
.300: 175 (int), 128 (ex)
.400: 206 (int), 154 (ex)
.450: 212 (int), 167 (ex)
.500: 215 (int), 172 (ex)
.600: 215 (int), 177 (ex)
I have the flow sheet showing this.
Scoggin-Dickey sells the unported version of these heads for 552.95, each, plus shipping.
http://sdparts.com/details/gm-factor...parts/10185087
Pace Performance sells the unported versions for 609.95, each, plus shipping.
http://paceperformance.com/index.asp...D&ProdID=22850
I'll take 850 for the pair of these, shipped, with insurance, to anywhere in the lower 48 states.
email me at seanof30306@yahoo.com
