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PORSCHE 911 (Sport Compact Section)

Designed for air-cooled 911 engines with a Nickel Ceramic bore, these pistons are machined from forged 2618 alloy for greater strength. The valve pockets are machined to accommodate high lift cams, and accept the stock stroke and rod length. The ring grooves are precision CNC machined for OEM style rings. (Except 2.7L)

Includes:
Pin fitting and wire locks
9310 high carbon alloy or tool steel wrist pins
PORSCHE 911 2.7L
Std Bore: 90mm
866-2500-15-93C Upgraded Pin Included
Ring package designed for: 1.0, 1.2, 2.8mm

Tech and Installation Tips
Part # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included
Ring Set#
261663 90.0 STD 70.4 127.8 34 68.0 9.5:1 21.8 404 U R JG1006-3543
261664 90.0 STD 70.4 127.8 34 68.0 10.5:1 27.3 419 U R JG1006-3543
261665 92.0 2.00 70.4 127.8 34 68.0 9.5:1 19.7 403 U,M R JG1006-3622
261666 92.0 2.00 70.4 127.8 34 68.0 10.5:1 25.5 418 U R JG1006-3622


PORSCHE 911 3.0L
Std Bore: 95mm
866-2500-15-93C Upgraded Pin Included
Ring package designed for: 1.5, 1.75, 3.5MM
Part # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included
Ring Set#
274048 95.0 STD 70.4 127.8 34 90.0 9.5:1 38.5 450 U R J650U6-3740
274049 95.0 STD 70.4 127.8 34 90.0 10.5:1 44.7 472 U R J650U6-3740


PORSCHE 911 3.0L
Std Bore: 95mm
866-2500-15-93C Upgraded Pin Included
Ring package designed for: 1.5, 1.5, 3.0MM
Part # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included
Ring Set#
274638 98.0 3.00 70.4 127.8 34 90.0 9.5:1 35.2 477 U R J612U6-3858
274051 98.0 3.00 70.4 127.8 34 90.0 10.5:1 41.8 482 U R J612U6-3858


PORSCHE 911 3.2L
Std Bore: 95mm
905-2500-15-52C Upgraded Pin Included
Ring package designed for: 1.5, 1.75, 3.5MM
Part # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included
Ring Set#
274640 95.0 STD 74.4 127 32.8 90.0 9.5:1 35.1 445 U,M R J650U6-3740
274639 95.0 STD 74.4 127 32.8 90.0 10.5:1 41.7 450 U R J650U6-3740
274644 95.0 STD 74.4 127 32.8 90.0 11.5:1 47.0 464 U R J650U6-3740


PORSCHE 911 3.2L
Std Bore: 95mm
905-2500-15-52C Upgraded Pin Included
Ring package designed for: 1.5, 1.5, 3.0MM
Part # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included
Ring Set#
274642 98.0 3.00 74.4 127 32.8 90.0 9.5:1 31.6 470 U R J612U6-3858
274645 98.0 3.00 74.4 127 32.8 90.0 10.5:1 38.6 466 U R J612U6-3858
274646 98.0 3.00 74.4 127 32.8 90.0 11.5:1 44.2 477 U,M R J612U6-3858


PORSCHE 911 3.2L
Std Bore: 95mm
905-2500-15-52C Upgraded Pin Included
Ring package designed for: 1.5, 1.75, 3.5MM
Part # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included
Ring Set#
274643 100.0 5.00 74.4 127 32.8 90.0 10.5:1 36.5 491 U,M R J660U6-3937
274647 100.0 5.00 74.4 127 32.8 90.0 11.5:1 42.3 496 U,M R J660U6-3937


PORSCHE 911 3.3L TURBO
Std Bore: 97mm
905-2500-18-93C Upgraded Pin Included
Ring package designed for: 1.5, 1.75, 3.0mm
Part # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included
Ring Set#
331158 97.0 STD 74.4 127 32.8 90.0 8.0:1 17.5 New T R JG1006-3819
331159 97.0 STD 74.4 127 32.8 90.0 8.5:1 22.8 New T R JG1006-3819
274648 98.0 1.00 74.4 127 32.8 90.0 8.0:1 17.5 439 T R J612U6-3858
274649 98.0 1.00 74.4 127 32.8 90.0 8.5:1 22.8 441 T R J612U6-3858


PORSCHE 911 3.6L
Std Bore: 100mm
905-2500-15-52C Upgraded Pin Included
Ring package designed for: 1.5, 1.75, 3.0MM
Part # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CC's C/R With .040 Dome CC's Gram Footnote Skirt Included
Ring Set#
274637 100.0 STD 76.4 127 31.8 90.0 11.5:1 40.8 482 U R J660U6-3937
274636 100.0 STD 76.4 127 31.8 90.0 12.5:1 45.8 494 U R J660U6-3937
274046 102.0 2.00 76.4 127 31.8 90.0 11.5:1 38.8 494 U R J660U6-4016
274045 102.0 2.00 76.4 127 31.8 90.0 12.5:1 44.0 506 U R J660U6-4016

- 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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