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Maximum Effort Race Piston |
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 All
HRC pistons are machined on the most modern CNC equipment in the
industry. They are forged from 2618-T61 aluminum for ultimate
strength and fatigue resistance. The design of the CNC turned skirts
allows these pistons to work properly under intense heat and severe side
loads without scuffing or splitting the cylinder walls. Skirt to wall
clearance on most HRC pistons is designed to operate at .004” clearance.
Dome pistons are designed with radiused domes, eliminating sharp edges
and “hot spots”. The valve pockets are built to handle large cam
profiles and oversized valves. Pocket angles are designed to work with
most angle-milled heads. Forced pin oiliers are standard, as are the
aircraft quality pins that are heat-treated and end ground to work in
floated or press fit applications. Double spiro lox are included.
Replacements are available as needed. Rings are available for all
stocking pistons. |
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H.R.C. Part # |
Bore |
Stroke |
Rod Length |
Style |
C.H. |
Note |
C.R. |
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Chev SB
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Part #HRC4567 |
4.030" |
3.480" |
6.0 |
-4cc Flat Top |
1.268 |
– |
10.0-1 |
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Part #HRC4572 |
4.030" |
3.480" |
6.0 |
12.7cc Dome |
1.268 |
– |
12.4-1 |
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Part #HRC4583 |
4.030" |
3.5625" |
6.0 |
-4cc Flat Top |
1.227 |
– |
10.25-1 |
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Part #HRC4579 |
4.030" |
3.750" |
6.0 |
-4cc Flat Top |
1.133 |
– |
10.7-1 |
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Part #HRC4584 |
4.030" |
3.750" |
6.0 |
7.8cc Dome |
1.133 |
1/8" Oil |
12.4-1 |
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Part #HRC4570 |
4.030" |
3.750" |
6.0 |
5.6cc Dome |
1.125 |
– |
12.1-1 |
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Part #HRC4585 |
4.040" |
3.480" |
6.0 |
12.4cc Dome |
1.268 |
– |
12.4-1 |
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Part #HRC4566 |
4.155" |
3.750" |
6.0 |
-4cc Flat Top |
1.133 |
1/8" Oil |
11.2-1 |
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Part #HRC4561 |
4.155" |
3.750" |
6.0 |
4.5cc Dome |
1.133 |
1/8" Oil |
12.4-1 |
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Part #HRC4582 |
4.155" |
3.750" |
6.0 |
6.7cc Dome |
1.120 |
1/8" Oil |
12.3-1 |
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Part #HRC4568 |
4.155" |
3.875" |
6.0 |
-4cc Flat Top |
1.063 |
– |
11.4-1 |
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Part #HRC4581 |
4.155" |
3.875" |
6.0 |
3cc Dome |
1.071 |
– |
12.6-1 |
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Part #HRC4569 |
4.155" |
4.000" |
6.0 |
-6cc Flat Top |
1.000 |
– |
11.7-1 |
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Part #HRC4580 |
4.155" |
4.000" |
6.0 |
5.6cc Dome |
1.000 |
– |
13.1-1 |
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Part #HRC4562 |
4.155" |
4.000" |
6.0 |
11cc Dome |
1.008 |
– |
14.4-1 |
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Chev BB |
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Part #HRC4591 |
4.310" |
4.250" |
6.385" |
51cc Dome |
1.273 |
– |
13.5-1 |
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Part #HRC4592 |
4.350" |
4.500" |
6.535 |
43cc Dome |
1.398 |
10.2" Deck only |
13.5-1 |
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Part #HRC4578 |
4.500" |
4.250" |
6.385 |
-3cc Flat Top |
1.273 |
– |
9.1-1 |
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Part #HRC4586 |
4.500" |
4.250" |
6.385 |
42.1cc Dome |
1.273 |
– |
13.1-1 |
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Part #HRC4587 |
4.600" |
4.250" |
6.535 |
45cc Dome |
1.120 |
– |
13.9-1 |
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Compression comparison is given in 64cc for SB Chev. and
118cc for BB Chev. SB 9.025” DH w/.041” gasket BB 9.800” DH w/.041”
gasket (except HRC4592)
Call for Discount Prices When Purchased with a Rotating Assembly. |
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