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The ring grooves are precision machined for .043, .043, 3mm back cut rings with lateral gas ports for superior ring seal.		   JE Pistons - SB Chevy 350 & 400
Tour Series GP (Gas Ported)
Includes: Pistons, Spiro Locks

Similar to the Ultra Light GP, this piston has undergone engineering changes to handle higher horsepower 4-barrel applications (approximately 650 hp) and angle milled heads. Both 350 and 400 series accept oversize valves (intake pocket is 2.255" and the exhaust pocket is 1.870") and long duration, tight lobe separation cams. The ring grooves are precision machined for .043, .043, 3mm back cut rings with lateral gas ports for superior ring seal.
  • Lateral Gas Ports
  • Contact Reduction Grooves
  • Double Spiro Locks #927-042-CS
  • Double Pin Oilers
  • .290" Deep Intake Pocket (350 series)
  • .295" Deep Intake Pocket (400 series)
Part #
(Click part #
for matching
piston rings)		 Bore Stroke Rod
Length		 C/H
Comp Ratio
58cc 64cc 76cc
 Dome
Vol.

Foot
Notes

 Grams Price
350 Series - Std Bore: 4.000
170695 4.030 3.500 6.250 1.000
11.2 10.3 9.1
 -5.0 A, B 370 $833
170696 4.040 3.500 6.250 1.000
11.2 10.3 9.1
 -5.0 A, B 374 $833
170697 4.030 3.500 6.125 1.125
11.2 10.3 9.1
 -5.0 A 380 $786
170698 4.040 3.500 6.125 1.125
11.2 10.3 9.1
 -5.0 A 384 $786
170697 4.030 3.750 6.000 1.125
11.9 11.1 9.7
 -5.0 - 380 $786
170698 4.030 3.750 6.000 1.125
11.9 11.1 9.7
 -5.0  - 384 $786
170692 4.030 3.500 6.000 1.250
11.2 10.3 9.1
 -5.0 A 398 $786
170693 4.040 3.500 6.000 1.250
11.2 10.3 9.1
 -5.0 A 401 $786
170694 4.060 3.500 6.000 1.250
11.2 10.3 9.1
 -5.0 A 410 $786
170689 4.030 3.500 5.700 1.550
11.2 10.3 9.1
 -5.0 A 439 $786
170690 4.040 3.500 5.700 1.550
11.2 10.3 9.1
 -5.0 A 442 $786
170691 4.060 3.500 5.700 1.550
11.2 10.3 9.1
 -5.0 A 453 $786
Part #
(Click part #
for matching
piston rings)		 Bore Stroke Rod
Length		 C/H
Comp Ratio
58cc 64cc 76cc
 Dome
Vol.

Foot
Notes

 Grams Price
400 Series - Std. Bore: 4.125
181933 4.155 3.500 6.125 1.125
11.7 10.9 9.6
 -5.0 A 424 $786
181933 4.155 3.750 6.000 1.125
12.5 11.6 10.2
 -5.0  - 424 $786
Foot Notes:
A = fits 3.480 and 3.500 stroke
B = Oil Rail Support is included
 
 
 
 
 
 
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