SMALL BLOCK CHEVY
BIG BLOCK CHEVY
FORD
MOPAR
BUICK
NHRA
TOUR SERIES GP (GAS PORTED)

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.

Includes:
Lateral Gas Ports
Contact Reduction Grooves
Double Spiro Locks #927-042-CS
Double Pin Oilers

350 Series
Std Bore: 4.000
Ring package designed for: .043, .043, 3MM Rings
 Tech and Installation Tips
 Valve Relief Diagram
Part # Cubic
Inches		 Bore Stroke Rod
Length		 Block
Height		 Compression
Distance
Head Cubic Centimeters
58cc 64cc 76cc
Compression Ratio
Dome
Volume		 Gram
Weight		 Footnote Oversize
170695 357 4.030 3.500 6.250 9.000 1.000 11.2 10.3 9.1 -5.0 370 A,B 0.030
170696 358 4.040 3.500 6.250 9.000 1.000 11.2 10.3 9.1 -5.0 374 A,B 0.040
170697 357 4.030 3.500 6.125 9.000 1.125 11.2 10.3 9.1 -5.0 385 A 0.030
170698 358 4.040 3.500 6.125 9.000 1.125 11.2 10.3 9.1 -5.0 389 A 0.040
170697 383 4.030 3.750 6.000 9.000 1.125 11.9 11.1 9.7 -5.0 385   0.030
170698 385 4.040 3.750 6.000 9.000 1.125 11.9 11.1 9.7 -5.0 389   0.040
170692 357 4.030 3.500 6.000 9.000 1.250 11.2 10.3 9.1 -5.0 398 A 0.030
170693 359 4.040 3.500 6.000 9.000 1.250 11.2 10.3 9.1 -5.0 401 A 0.040
170694 362 4.060 3.500 6.000 9.000 1.250 11.2 10.3 9.1 -5.0 410 A 0.060
170689 357 4.030 3.500 5.700 9.000 1.550 11.2 10.3 9.1 -5.0 439 A 0.030
170690 359 4.040 3.500 5.700 9.000 1.550 11.2 10.3 9.1 -5.0 442 A 0.040
170691 362 4.060 3.500 5.700 9.000 1.550 11.2 10.3 9.1 -5.0 453 A 0.060

400 Series
Std Bore: 4.125
Ring package designed for: .043, .043, 3MM Rings
Part # Cubic
Inches		 Bore Stroke Rod
Length		 Block
Height		 Compression
Distance
Head Cubic Centimeters
58cc 64cc 76cc
Compression Ratio
Dome
Volume		 Gram
Weight		 Footnote Oversize
181933 380 4.155 3.500 6.125 9.000 1.125 11.7 10.9 9.6 -5.0 424 A 0.030
181933 407 4.155 3.750 6.000 9.000 1.125 12.5 11.6 10.2 -5.0 424   0.030


- 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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