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Performer For 1987-95 Centerbolt
Designed for 1987-95 Throttle Body Injected (T.B.I.) and Tuned Port Injected (T.P.I.) 5.7L S/B Chevy engines originally equipped with centerbolt valve covers. Performer centerbolt cylinder heads are 50-state street legal and accept factory centerbolt valve covers. The intake bolt pattern utilizes the 1987-95, 73° angle on the two center bolts. Will maintain stock compression ratio when used with the recommended head gasket.
Cylinder Head Specifications |
| Combustion chamber volume |
60cc |
| Intake runner volume |
165cc |
| Exhaust runner volume |
65cc |
| Intake valve diameter |
2.02" |
| Exhaust valve diameter |
1.60" |
| Valve stem diameter |
11/32" |
| Valve guides |
Manganese bronze |
| Deck thickness |
5/8" |
| Valve spring diameter |
1.46" |
| Valve spring maximum lift |
0.575" |
| Rocker stud |
3/8" |
| Guideplate |
Hardened steel |
| Pushrod diameter |
5/16" |
| Valve angle |
23° |
| Exhaust port location |
Stock |
| Spark plug fitment |
14mm x 3/4 reach, gasket seat |
| Made In |
USA |
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Technical Notes: Match with Edelbrock head gasket sets on pages 126-128. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. |
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| Description |
Bare (Single) |
Complete (Single) |
| Street Legal Performer Centerbolt |
60849 |
60859 |
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Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
| #60859 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
64 |
122 |
177 |
217 |
229 |
232 |
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| Exhaust |
54 |
96 |
124 |
147 |
166 |
175 |
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AMC
Small Block
