Ross Racing Pistons Ford 302 5.0 351W 4.6 and 5.4 MOD Engine Pistons
Ross Racing Pistons offers a large selection of pistons for Ford and Mercury engines. We have Ross Ford pistons and Ross Mercury Pistons available for the Windsor, Cleveland, 4.6 Modular, FE Big Blocks, Flatheads and the 2000 and 2300 engines. These pistons are great for use in drag race and oval track cars, as well as high performance street and muscle cars.
ROSS Racing Pistons are used in Ford and Mercury high performance and racing engines by knowledgeable engine builders the world over. They combine light weight, high strength, precision machining and premium materials to build a piston you can depend on for high horsepower, torque and reliability. We offer these superb pistons at very affordable prices.
Ross Racing Pistons offers pistons in both stocking and custom sets. In most cases you can find a stocking set to fit your needs. If you do not see the exact piston specs you want in a stocking piston, we will be happy to help you with a custom piston design. Custom pistons can be made for just about any type of engine. Please visit our custom piston page for more info or contact us and we will be happy to assist you with a custom piston order. We offer discounted pricing, even on custom pistons.
Ross Ford pistons and Ross Mercury Pistons include forced pin oilers and double spirolox on all of their stocking pistons. Pistons are balanced to plus or minus 2.5 grams throughout the set. You can buy replacement pistons one at a time as needed. The valve pockets are designed to handle most camshaft applications. The skirt design allows the pistons to work properly under intense heat and tremendous side loads without scuffing or splitting cylinder walls. Most normally aspirated pistons are designed to operate at .004 piston skirt to cylinder wall clearance. All ROSS stocking pistons include aircraft quality pins that are heat treated and end ground to work in full floated or press fit applications.
Use these links to go directly to the Ford engine forged Ross piston listing you are interested in.
- 302 5.0 Windsor Flat Top and Dish Top Normally Aspirated and Nitrous Pistons
- 302 351 Windsor
- 351 Cleveland
- 390 406 410 427 428 FE Big Block
- 4.6L 5.4L Modular
- Ford 2000 and 2300 4 cylinder forged pistons
- Ford Flathead and Mercury Flat head piston sets
Please feel free to use our compression ratio calculator to help you decide on the piston specifications you want. Click here to go direct to our Compression Ratio Calculator or visit our Race Math Page.
Ford Windsor 302 351 Pistons
Flat top Pistons
ROSS Ford Windsor Flat Top Pistons in this section are machined on Ross's new XL400 forging for maximum strength and minimum weight. All pistons with "1" valve pocket location as shown in the NOTE column, will work with Dart, Edelbrock, Alan Root, SVO J302, R351, N351 and 289 stock heads. All pistons marked with "4" valve pocket location will work with TFS "Twisted Wedge" heads. All pistons in this section include aircraft quality pins that are retained with double spirolox or can be press fitted into rods. 302 Block Height = 8.200" 351 Block Height = 9.480".
Ford Flat Top 302 and 351 Windsor Pistons
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Engine Block |
Bore |
Stroke |
Rod Length |
Grams |
C.H. |
Pin Dia. |
Notes |
Piston Set Part Number |
|---|---|---|---|---|---|---|---|---|
| 302 | 4.030 | 3.000 | 5.090 | 423 | 1.599 | .912 | 1 | 99792 |
302 |
4.030 |
3.000 |
5.090 |
481 |
1.599 |
0.912 |
4 | 99502 |
302 |
4.030 |
3.000 |
5.090 |
465 |
1.599 |
0.912 |
1 | 82006 |
| 302 | 4.030 | 3.250 | 5.315 | 424 | 1.175 | .927 | 1* | 99824 |
| 302 | 4.030 | 3.400 | 5.315 | 432 | 1.175 | .927 | 4* | 99825 |
| 302 | 4.030 | 3.400 | 5.400 | 401 | 1.083 | .927 | 1* | 99822 |
302 |
4.030 |
3.400 |
5.400 |
402 |
1.085 |
0.927 |
4* |
99505 |
351 |
4.030 |
3.500 |
5.956 |
504 |
1.757 |
0.912 |
4 | 99504 |
351 |
4.030 |
3.500 |
5.956 |
471 |
1.757 |
0.912 |
1 | 80555 |
351 |
4.030 |
3.500 |
6.000 |
463 |
1.713 |
0.927 |
1 | 80565 |
351 |
4.030 |
4.000 |
6.125 |
462 |
1.358 |
0.927 |
4 | 99506 |
| 351 | 4.030 | 4.000 | 6.125 | 458 | 1.358 | .927 | 1 | 99826 |
NOTES
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Piston Ring SetRoss plasma moly file fit piston ring set to work with any of the above 4.030 bore piston sets. Ring widths are 1/16 1/16 3/16 with a standard tension oil ring. Part Number RS-9771-35 |
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302 351 Windsor 9.5 to 1 pistons
ROSS 302 Ford Windsor pistons in this section are suitable for nitrous systems below 250 horsepower. Ring sizes are 1/16, 1/16, 3/16. Will work with TFS High Port "Street Heat" heads, TFS "Twisted Wedge" heads, and Canfield Avenger heads due to three valve pocket design. Pins included are .927 diameter, 2.950 length, .150 wall aircraft quality.
NOT RECOMMENDED FOR USE WITH FORCED INDUCTION SYSTEMS.
Compression ratio based on 64cc cylinder head chamber volume.
Ford 302 W and 351 W 9.5-1 Compression Pistons |
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| Engine Block | Bore |
Stroke |
Rod Length |
Dome CC |
Comp. Ratio | Pin dia |
CH |
|
|---|---|---|---|---|---|---|---|---|
| 302 | 4.001 | 3.250 | 5.400 | -6.1 | 9.3 | .927 | 1.160 | |
| 302 | 4.001 | 3.250 | 5.400 | -20.0 | 8.1 | .927 | 1.160 | |
| 302 | 4.001 | 3.400 | 5.400 | -6.1 | 9.7 | .927 | 1.085 | |
| 302 | 4.001 | 3.400 | 5.400 | -12.0 | 9.1 | .927 | 1.085 | |
| 302 | 4.001 | 3.400 | 5.400 | -6.1 | 10.6 | .912 | 1.085 | |
| 351 | 4.001 | 3.850 | 6.200 | -6.1 | 10.9 | .912 | 1.350 | |
| 302 | 4.030 | 3.250 | 5.400 | -6.1 | 9.4 | .927 | 1.160 | |
| 302 | 4.030 | 3.250 | 5.400 | -20.0 | 8.2 | .927 | 1.160 | |
| 302 | 4.030 |
3.400 |
5.400 |
-12 |
9.2 | .927 |
1.085 |
99609 |
| 351 | 4.030 | 3.750 | 6.250 | -6.1 | 10.7 | .927 | 1.350 | |
| 351 | 4.030 | 3.750 | 6.250 | -18.0 | 9.5 | .927 | 1.350 | |
| 351 | 4.030 | 3.850 | 6.200 | -6.1 | 11.0 | .927 | 1.350 | |
| 351 | 4.030 | 3.850 | 6.200 | -18.0 | 9.7 | .927 | 1.350 | |
Windsor 12.5 to 1 Pistons
ROSS Ford Windsor Pistons in this section are suitable for nitrous systems below 250 horsepower. Part # 80561 and 99607 come with .927 diameter aircraft quality pins, while Part # 80551 features .912 (stock Ford) aircraft quality pins. Compression ratio is based on 64 cc head with .050 total piston to head clearance (deck and gasket). Dome style "F" fits stock Windsor and Motorsports J-302 (AR) style heads. Dome style "A" fits TFS High Port "Street Heat" heads. Pins retained by double spirolox or can be press fitted into rods. Ring sizes are 1/16, 1/16, 3/16.
NOT RECOMMENDED FOR USE WITH FORCED INDUCTION SYSTEMS.
High Compression 302 351W Dome Top Pistons |
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Notes |
Engine Block |
Bore |
Stroke |
Rod Length |
Dome CC |
Grams |
C.H. |
Pin Dia. |
Piston Set Part Number |
|---|---|---|---|---|---|---|---|---|---|
* A |
302 |
4.030 |
3.400 |
5.400 |
11 |
447 |
1.085 |
0.927 |
99607 |
F |
351 |
4.030 |
3.500 |
5.956 |
12 |
570 |
1.757 |
0.912 |
80551 |
^ F |
351 |
4.030 |
3.500 |
6.000 |
12 |
497 |
1.713 |
0.927 |
80561 |
*includes oil support rails ^ This part number has been discontinued by Ross. The specifications have been kept here for those that may already have these pistons, or find them at a swap meet, at auction, etc. and may need to confirm specs. |
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We also sell K1 Technologies 4340 forged steel Ford 302 Stroker crankshafts which make an ideal match with these pistons.
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