Stock:
Tubing size: 3/8" x .060"
Material: 1010
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MaxSpool Pushrods:
3/8" x .083" Heat Treated 4340 Chrome moly with 4340 billet cups
Gorilla push rods are 7/16" x .165" wall tappered to 3/8's on either end
I was told some other brands use 4310 with 8620 cups, according to MaxSpool
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Manning:
-3/8" x .083"
-4340 with billet ends
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1998.5-2012 24 valve Cummins
Hamilton sells two styles of pushrods.......HD and Extreme
Hamilton HD Pushrods:
-3/8" x .095"
-4130 Chromoly w/ hardened 8620 ends
Hamilton Extreme:
Intake: 3/8" x .095"
Exhaust: 7/16" x .120"
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Trend definately has choices, but they also can't spell...."Cummings" on their website
Cummins Pushrods | Trend Performance
Stage I
#TPD1160803-3
Black oxide
3/8" x .080" wall
Stage II
#TPD11601353-10C3
Satin finish
3/8" x .135″ wall
Stage III:
#TPD11601657-10C3
Satin finish
7/16" x .165″ wall
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Manton's prices are great:
http://www.mantonpushrods.com/Images/Jobber_Price_4_Web.pdf
Series 3:
-4130/4135 Hard Drawn
- Non-Guide Plate Use
Series 4:
-4130/4135 MeloniteTM Processed
-Guide Plate Use
Series 5:
-4130/4135 Salt Heat Treated to 275,000 p.s.i. Tensil
-Non-Guide Plate Use
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Smith Brothers:
Smith Bros. Push Rods Bend Oregon
Made from 4130 chromoly tube.
They have 3/8 tube in .120” and .145” wall thickness
They have 7/16 tube in .095”, .120” and .165” wall tube.
They said the 3/8 diameter is most common on the Cummins engines, but there are a few customers that do order the larger 7/16.
The rep said the bottom near the lifter is usually the area of concern with the 7/16 pushrods as to whether they will clear or not. Here are some prices on sets of 12:
3/8 x .120 --- $178.80
3/8 x .145 --- $205.68
7/16 x .095 --- $180.48
7/16 x .120 --- $214.68
7/16 x .165 --- $268.32
