4.6L / 5.4L MODULAR
These pistons are designed for 4.6/5.4L engines and are compatible with forced induction and nitrous applications. Low compression pistons feature our spherical dish for the ultimate in combustion efficiency. These pistons are race proven in turbo modular motors posting mid 6-second times in the 1/4 mile. 4.6L part numbers now include valve reliefs for either 3V or 4V heads as noted below. 5.4L part numbers have no valve reliefs. Accept 1.5, 1.5, 3.0mm rings.
Includes:
Pin #866-2500-15-51S (109g)
Double spiro locks (#866-042-CS)
Contact reduction grooves
Double pin oilers
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4.6L 4V Flat Top
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 42cc |
46cc |
52cc |
| Compression Ratio |
|
Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
 |
| 257540 |
281 |
3.552 |
3.543 |
5.933 |
8.925 |
1.220 |
12.1 |
11.5 |
10.3 |
-3.0 |
364 |
M |
STD |
J68008-3550-5 |
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| 257541 |
284 |
3.572 |
3.543 |
5.933 |
8.925 |
1.220 |
12.2 |
11.6 |
10.4 |
-3.0 |
376 |
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0.020 |
J68008-3570-5 |
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4.6L 4V Dish
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 42cc |
45cc |
52cc |
| Compression Ratio |
|
Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
|
| 257542 |
281 |
3.552 |
3.543 |
5.933 |
8.925 |
1.220 |
9.7 |
9.2 |
8.6 |
-17.0 |
375 |
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STD |
J68008-3550-5 |
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| 257544 |
281 |
3.552 |
3.543 |
5.933 |
8.925 |
1.220 |
10.7 |
10.2 |
9.3 |
-10.0 |
364 |
M |
STD |
J68008-3550-5 |
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| 257543 |
284 |
3.572 |
3.543 |
5.933 |
8.925 |
1.220 |
9.8 |
9.3 |
8.6 |
-17.0 |
380 |
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0.020 |
J68008-3570-5 |
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| 257545 |
284 |
3.572 |
3.543 |
5.933 |
8.925 |
1.220 |
10.8 |
10.2 |
9.4 |
-10.0 |
376 |
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0.020 |
J68008-3570-5 |
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4.6L 3 VALVE FLAT TOP
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 42cc |
45cc |
52cc |
| Compression Ratio |
|
Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
|
| 232468 |
281 |
3.552 |
3.543 |
5.933 |
8.925 |
1.220 |
12.7 |
11.8 |
10.7 |
-1.0 |
361 |
M |
STD |
J68008-3550-5 |
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| 232469 |
284 |
3.572 |
3.543 |
5.933 |
8.925 |
1.220 |
12.8 |
11.9 |
10.8 |
-1.0 |
372 |
M |
0.020 |
J68008-3570-5 |
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4.6L 3 VALVE DISH
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 42cc |
45cc |
52cc |
| Compression Ratio |
|
Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
|
| 232466 |
281 |
3.552 |
3.543 |
5.933 |
8.925 |
1.220 |
9.7 |
9.2 |
8.6 |
-17.0 |
375 |
M |
STD |
J68008-3550-5 |
|
| 232467 |
284 |
3.572 |
3.543 |
5.933 |
8.925 |
1.220 |
9.8 |
9.3 |
8.6 |
-17.0 |
379 |
M |
0.020 |
J68008-3570-5 |
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5.4L DISH
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
Note: (* Compression Ratio's for 5.4L Pistons are calculated with .120" deck clearance)
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 42cc |
45cc |
52cc |
| Compression Ratio |
|
Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
|
| 227125 |
330 |
3.552 |
4.165 |
6.657 |
9.960 |
1.220 |
8.5 |
8.2 |
7.8 |
-21.0 |
409 |
* |
STD |
J68008-3550-5 |
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| 227127 |
334 |
3.572 |
4.165 |
6.657 |
9.960 |
1.220 |
8.6 |
8.3 |
7.9 |
-21.0 |
385 |
* |
0.020 |
J68008-3570-5 |
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Tech and Installation Tips
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Valve Relief Diagram
- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.