|
Bore Size, Stroke, Rod Length, Dome Volume, Comp. Ratio, Comp. Distance, Avg. Wght. |
| Chev SB Inverted Dome (Dish) w/64cc |
|
| 840342128 |
4.030, 3.750, 5.700, -28.0cc, 8.7, 1.425, 473 |
| 840442128 |
4.040, 3.750, 5.700, -28.0cc, 8.8, 1.425, 478 |
| 840642128 |
4.060, 3.750, 5.700, -28.0cc, 8.8, 1.425, 486 |
| Chev SB Flat Top w/64cc |
|
| 840355305 |
4.030, 3.480/3.500, 5.700, -5.0cc, 10.3, 1.550, 510 |
| 840325305 |
4.030, 3.480/3.500, 6.000, -5.0cc, 10.3, 1.250, 427 |
| 840312305 |
4.030, 3.480/3.500, 6.125, -5.0cc, 10.3, 1.125, 405 |
| 840322305 |
4.030, 3.562, 6.000, -5.0cc, 10.5, 1.220, 425 |
| 840312305 |
4.030, 3.750, 6.000, -5.0cc, 11.0, 1.125, 405 |
| 840306305 |
4.030, 3.875, 6.000, -5.0cc, 11.3, 1.062, 392 |
| 840455305 |
4.040, 3.480/3.500, 5.700, -5.0cc, 10.4, 1.550, 456 |
| 840425305 |
4.040, 3.480/3.500, 6.000, -5.0cc, 10.4, 1.250, 430 |
| 840412305 |
4.040, 3.480/3.500, 6.125, -5.0cc, 10.4, 1.125, 428 |
| 840422305 |
4.040, 3.562, 6.000, -5.0cc, 10.6, 1.220, 427 |
| 840412305 |
4.040, 3.750, 6.000, -5.0cc, 11.0, 1.125, 428 |
| 840406305 |
4.040, 3.875, 6.000, -5.0cc, 11.4, 1.062, 395 |
| 840655305 |
4.060, 3.480/3.500, 5.700, -5.0cc, 10.5, 1.550, 464 |
| 840625305 |
4.060, 3.480/3.500, 6.000, -5.0cc, 10.5, 1.250, 433 |
| 840612305 |
4.060, 3.480/3.500, 6.125, -5.0cc, 10.5, 1.125, 413 |
| 841200306 |
4.125, 3.480/3.500, 6.250, -6.0cc, 10.6, 1.000, 415 |
| 841200306 |
4.125, 3.750, 6.125, -6.0cc, 11.3, 1.000, 415 |
| 841206306 |
4.125, 3.875, 6.000, -6.0cc, 11.6, 1.062, 421 |
| 841200306 |
4.125, 4.000, 6.000, -6.0cc, 12.0, 1.000, 415 |
| 841512306 |
4.155, 3.480/3.500, 6.125, -6.0cc, 10.7, 1.125, 448 |
| 841500306 |
4.155, 3.480/3.500, 6.250, -6.0cc, 10.7, 1.000, 420 |
| 841542306 |
4.155, 3.750, 5.700, -6.0cc, 11.4, 1.425, 486 |
| 841512306 |
4.155, 3.750, 6.000, -6.0cc, 11.4, 1.125, 446 |
| 841500306 |
4.155, 3.750, 6.125, -6.0cc, 11.4, 1.000, 420 |
| 841506306 |
4.155, 3.875, 6.000, -6.0cc, 11.8, 1.062, 434 |
| 841500306 |
4.155, 4.000, 6.000, -6.0cc, 12.1, 1.000, 420 |
| 841612306 |
4.165, 3.480/3.500, 6.125, -6.0cc, 10.8, 1.125, 452 |
| 841600306 |
4.165, 3.480/3.500, 6.250, -6.0cc, 10.8, 1.000, 428 |
| 841612306 |
4.165, 3.750, 6.000, -6.0cc, 11.5, 1.125, 452 |
| 841600306 |
4.165, 3.750, 6.125, -6.0cc, 11.5, 1.000, 428 |
| 841606306 |
4.165, 3.875, 6.000, -6.0cc, 11.8, 1.062, 441 |
| 841600306 |
4.165, 4.000, 6.000, -6.0cc, 12.2, 1.000, 428 |
| Chev SB Dome w/64cc |
|
| 840355613 |
4.030, 3.480/3.500, 5.700, 13.0cc, 13.1, 1.550, 480 |
| 840325613 |
4.030, 3.480/3.500, 6.000, 13.0cc, 13.1, 1.250, 464 |
| 840312608 |
4.030, 3.480/3.500, 6.125, 8.0cc, 12.2, 1.125, 432 |
| 840342608 |
4.030, 3.750, 5.700, 8.0cc, 13.0, 1.425, 472 |
| 840312608 |
4.030, 3.750, 6.000, 8.0cc, 13.0, 1.125, 432 |
| 840425613 |
4.040, 3.480/3.500, 6.000, 13.0cc, 13.2, 1.250, 464 |
| 840412608 |
4.040, 3.480/3.500, 6.125, 8.0cc, 12.2, 1.125, 434 |
| 840412608 |
4.040, 3.750, 6.000, 8.0cc, 13.0, 1.125, 434 |
| 840625613 |
4.060, 3.480/3.500, 6.000, 13.0cc, 13.3, 1.250, 473 |
| 840612608 |
4.060, 3.480/3.500, 6.125, 8.0cc, 12.3, 1.125, 438 |
| 840612608 |
4.060, 3.750, 6.000, 8.0cc, 13.1, 1.125, 438 |
| 841206603 |
4.125, 3.875, 6.000, 3.0cc, 13.0, 1.062, 436 |
| 841200603 |
4.125, 4.000, 6.000, 3.0cc, 13.4, 1.000, 428 |
| 841200608 |
4.125, 4.000, 6.000, 8.0cc, 14.3, 1.000, 437 |
| 841512608 |
4.155, 3.480/3.500, 6.125, 8.0cc, 12.8, 1.125, 472 |
| 841512608 |
4.155, 3.750, 6.000, 8.0cc, 13.6, 1.125, 472 |
| 841506603 |
4.155, 3.875, 6.000, 3.0cc, 13.1, 1.062, 448 |
| 841500603 |
4.155, 4.000, 6.000, 3.0cc, 13.5, 1.000, 448 |
| 841500608 |
4.155, 4.000, 6.000, 8.0cc, 14.5, 1.000, 448 |
| 841612608 |
4.165, 3.480/3.500, 6.125, 8.0cc, 12.8, 1.125, 476 |
| 841612608 |
4.165, 3.750, 6.000, 8.0cc, 13.7, 1.125, 438 |
| 841606603 |
4.165, 3.875, 6.000, 3.0cc, 13.2, 1.062, 452 |
| 841600608 |
4.165, 4.000, 6.000, 8.0cc, 14.5, 1.000, 452 |
| Ford 302 Flat Top 64cc/58cc |
|
| 860310305(3) |
4.030, 3.400, 5.400, -5.0cc, 10.0/10.7, 1.100, 401 |
| 860410305(3) |
4.040, 3.400, 5.400, -5.0cc, 10.0/10.8, 1.100, 405 |
| (3) Features .927” Piston Pins. |
|
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. Rings are available for all stocking pistons. 
The X-Beam forging design produces a stronger piston than most standard pistons for the ultimate in performance. All Howards HRC Racing Pistons are forged from 2618 billet bar stock and then heat treated and aged to a T61 condition (2618-T61). This material has less than 1% silicon particulate content. High silicon content pistons (forged from 4032 or MS75) will not stand up to the most extreme stress placed on many racing pistons. If a crack starts to form in a high silicon piston it will continue until the piston experiences a catastrophic failure. Simply stated, adding sand to the aluminum only makes it more brittle. Another advantage of 2618-T61 over the high silicon pistons is the ability to keep its shape under extreme pressure and high RPM's. "Skirt Shrinking" is not a problem with Howards HRC Racing Pistons. Standard features include CNC turned skirts, oversized valve pockets with radius valve reliefs, forced pin oilers, accumulator grooves and lock removal indents. Sets include lightweight (108g) .150” wall, heat treated aircraft quality wrist pins. Double spirolox are standard. 
Race winning technology at an affordable price. Superior combustion control in today’s extreme engines. Starting with a plasma moly ring that is barrel lapped for quick seating and long life. Second rings are cast iron reverse torsional twist. The oil ring features a stainless steel expander with chrome plated carbon steel rails. Manufacturered in the most popular bore sizes. A true seal for more horsepower and longer life. All applications are file fit. 
The most over looked upgrade to a competition engine. Precision machined from solid H-11 bar stock, heat treated and triple tempered, and centerless ground to 0.0001” total tolerance. Inner diameters are honed on Sunnen equipment to precise size and finish requirements, while the outside diameter features a slight O.D. edge break to maintain maximum bearing area. These pins will give you the best strength to weight ratio available. Sets of 8. 
High quality replacements for most popular performance pistons. Sold in sets of 32. Note: Spiral Locks are not designed to be reusable. You should always use a new set each time you remove and reassemble the piston and rods. 4 required per piston. 
