ROSS Racing Pistons (Honda B-Series w/ Forced Induction)

Ross Racing Pistons

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Bore & Comp Ratio

81.0mm / 9.0

81.5mm / 8.5

81.5mm / 9.0

84.0mm / 8.5

84.0mm / 9.0

84.0mm / 9.3

84.5mm / 9.0

85.0mm / 9.0

Variants

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Compression Ratio: Based on factory head gasket thickness of .027"

Forced Induction: Yes

Nitrous: Yes

Tech-Tip: For use with both VTEC and non-VTEC cylinder heads

What's Included: Rings, Locks, Pins (.827 H13 Taper Wall Pins)

BORE	STROKE	ROD LGTH	HEAD CC	C.H.	COMP RATIO	DOME VOLUME	RING GROOVES	GRAM WT.	PART NO.
3.209 (81.5 mm)	3.504	5.394	42.7	1.180	9.3	-6.1	1.5, 1.5, 3 mm	289	99807*
3.209 (81.5 mm)	3.504	5.394	42.7	1.180	8.5	-11.9	1.5, 1.5, 3 mm	304	99808*
3.307 (84 mm)	3.504	5.394	42.7	1.180	9.3	-9.1	1.5, 1.5, 3 mm	301	99841*
3.307 (84 mm)	3.504	5.394	42.7	1.180	8.5	-14.9	1.5, 1.5, 3 mm	298	99842*
3.189 (81 mm)	3.047	5.290	42.7	1.181	9.0	-4.0	1.0, 1.2, 2.8 mm	279	99850
3.209 (81.5 mm)	3.047	5.290	42.7	1.181	9.0	-4.3	1.0, 1.2, 2.8 mm	285	99851
3.307 (84 mm)	3.504	5.394	42.7	1.181	9.0	-14.0	1.0, 1.2, 2.8 mm	300	99857
3.327 (84.5 mm)	3.504	5.394	42.7	1.181	9.0	-13.5	1.0, 1.2, 2.8 mm	297	99858
3.346 (85 mm)	3.504	5.394	42.7	1.181	9.0	-14.3	1.0, 1.2, 2.8 mm	311	99859
* Includes Oil Ring Support Rails.

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