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4.6L 4V MODULAR

We have redesigned and expanded our Ford Modular product line! The new pistons utilize a dedicated Forged Side Relief (FSR) forging that was specifically designed for high horsepower Modular engines. In addition we have found ways to reduce weight and maintain the durability needed for both street and racing use. Lightweight and extremely durable, these pistons are machined for 1.0mm, 1.2mm, 2.8mm and 1.2mm, 1.5mm, 3.0mm rings.

Includes:
Pin #866-2250-15-51C (98g)
Round Wire Locks (#866-063-MW)
Accumulator Grooves
Offset Pin
New for 2013!
4.6L 4V Modular - NEW FSR Series!
Std Bore: 3.552"
Designed for 1.0mm, 1.2mm, 2.8mm or 1.2mm, 1.5mm, 3.0mm rings.
Compression ratio calculated at "O" deck and .040"head gasket thickness.

Click here to see matching JE Pro Seal Head Gaskets!

Tech and Installation Tips
Valve Relief Diagram
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
53
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
314640 297 3.552 3.750 5.850 8.925 1.200 8.5:1 -20.2 334 T,M STD JG3208-3551-0
314646 297 3.552 3.750 5.850 8.925 1.200 9.5:1 -10.6 341 T,M STD JG3208-3551-0
314651 297 3.552 3.750 5.850 8.925 1.200 11.0:1 .1 366 V,M STD JG3208-3551-0
314641 299 3.562 3.750 5.850 8.925 1.200 8.5:1 -20.6 336 T,M .010 JG1008-3563
314647 299 3.562 3.750 5.850 8.925 1.200 9.5:1 -11.0 343 T,M .010 JG1008-3563
314652 299 3.562 3.750 5.850 8.925 1.200 11.0:1 -.1 368 V,M .010 JG1008-3563
314642 301 3.572 3.750 5.850 8.925 1.200 8.5:1 -21.0 338 T,M .020 JG3208-3571-0
314648 301 3.572 3.750 5.850 8.925 1.200 9.5:1 -11.3 345 T,M .020 JG3208-3571-0
314653 301 3.572 3.750 5.850 8.925 1.200 11.0:1 -.5 370 V,M .020 JG3208-3571-0
314643 309 3.622 3.750 5.850 8.925 1.200 8.5:1 -23.0 343 T,M .070 JG1008-3622
314649 309 3.622 3.750 5.850 8.925 1.200 9.5:1 -13.2 350 T,M .070 JG1008-3622
314654 309 3.622 3.750 5.850 8.925 1.200 11.0:1 -2.0 374 V,M .070 JG1008-3622
314644 323 3.701 3.750 5.850 8.925 1.200 8.5:1 -26.5 348 T,M .149 JG1008-3701
314650 323 3.701 3.750 5.850 8.925 1.200 9.5:1 -16.1 354 T,M .149 JG1008-3701
314655 323 3.701 3.750 5.850 8.925 1.200 11.0:1 -4.4 378 V,M .149 JG1008-3701
314624 281 3.552 3.543 5.933 8.925 1.220 8.5:1 -15.6 336 T STD JG3208-3551-0
314629 281 3.552 3.543 5.933 8.925 1.220 9.5:1 -6.6 360 T STD JG3208-3551-0
314634 281 3.552 3.543 5.933 8.925 1.220 11.0:1 3.5 388 V,M STD JG3208-3551-0
314625 282 3.562 3.543 5.933 8.925 1.220 8.5:1 -16.0 338 T .010 JG1008-3563
314630 282 3.562 3.543 5.933 8.925 1.220 9.5:1 -7.0 362 T .010 JG1008-3563
314635 282 3.562 3.543 5.933 8.925 1.220 11.0:1 3.2 390 V,M .010 JG1008-3563
314626 284 3.572 3.543 5.933 8.925 1.220 8.5:1 -16.5 340 T .020 JG3208-3571-0
314631 284 3.572 3.543 5.933 8.925 1.220 9.5:1 -7.3 364 T .020 JG3208-3571-0
314636 284 3.572 3.543 5.933 8.925 1.220 11.0:1 2.9 392 V,M .020 JG3208-3571-0
314627 292 3.622 3.543 5.933 8.925 1.220 8.5:1 -18.4 345 T,M .070 JG1008-3622
314632 292 3.622 3.543 5.933 8.925 1.220 9.5:1 -9.0 369 T,M .070 JG1008-3622
314637 292 3.622 3.543 5.933 8.925 1.220 11.0:1 1.5 398 V,M .070 JG1008-3622
314628 305 3.701 3.543 5.933 8.925 1.220 8.5:1 -21.6 349 T,M .149 JG1008-3701
314633 305 3.701 3.543 5.933 8.925 1.220 9.5:1 -11.8 372 T,M .149 JG1008-3701
314638 305 3.701 3.543 5.933 8.925 1.220 11.0:1 -0.8 402 V,M .149 JG1008-3701


4.6L 4V Modular - Full Round Series
Std Bore: 3.552" Ring Package Designed for: 1.5 x 1.5 x 3.0mm Rings
Compression ratio calculated at "O" deck and .040"head gasket thickness.
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
42 46 52
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 -17 375 M STD J68008-3550-5
257544 281 3.552 3.543 5.933 8.925 1.220 10.7 10.2 9.3 -10 364 M STD J68008-3550-5
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
257543 284 3.572 3.543 5.933 8.925 1.220 9.8 9.3 8.6 -17 380 .020 J68008-3570-5
257545 284 3.572 3.543 5.933 8.925 1.220 10.8 10.2 9.4 -10 376 .020 J68008-3570-5
257541 284 3.572 3.543 5.933 8.925 1.220 12.2 11.6 10.4 -3.0 376 M 0.020 J68008-3570-5

- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.


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