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MANLEY

Manley Severe Duty 8mm x 1.930 L83 5.3L Intake Valves Stainless 12358-8

PART NUMBER:
12358-8
MPN:
12358-8
Availability:
Ships from Manufacturer
Shipping:
Free over $98 in U.S. 48
Type:
1.930 Intake Valves
Weight (grams):
113
Head Diameter (in.):
1.930
Stem Diameter (in.):
.3133
Valve Material:
XH-428 Stainless Steel
Installed Height (in.):
Stock
Overall Length (in.):
5.232
Tip Length (in.):
0.160
Valve Seat Width (in.):
0.110
Underhead Angle:
Pro Flo 12°
Notes:
Have a back cut of .050” x 30°
$290.82

Description

Manley Severe Duty 8mm x 1.930 L83 5.3L Intake Valves Stainless 12358-8

The Severe Duty® series of valves is the Manley signature in the performance and racing industry. Exhaust material XH-428 and intake material NK-844 is offered by no competitor in the world. And no pair of materials show such clear dominance over all others. Ultimate tensile strength of XH-428 at 1500°F is nearly double the competitors’ EV-8. At 1000°F the Manley NK-844 displays more than four times the ultimate tensile of the competition’s best intake material. Further proof of the superiority of the Manley Severe Duty® valves is evident in our comprehensive fatigue tests. In normal operation where valve float is non-existent, a valve will experience 20,000 to 25,000 lbs of applied stress. However, when valves bounce on the seat the stress immediately soars to 40,000 to 60,000 lbs. Manley exhaust valves (at 40,000 psi and 1400°F) ran to 100,000,000 (one hundred million) cycles while competitors’ offerings failed at 100,000 cycles. That’s 1000 times better fatigue life. -

SEVERE DUTY® SERIES

  • Superior Stainless for High Temperature Gasoline Engines
  • Exhaust Material XH-428 with Double the Ultimate Tensile Strength (at 1500°F) over the competition
  • Chrome Stems and Hard Tips
  • Swirl Polished and Fully Machined
  • Intake Material NK-844 with 1000 Times Better Fatigue Strength than competitors’ offerings

 

                                                  

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Warranty Information

Due to the intended usage of the products sold by Manley Performance Products, Inc., they are sold WITHOUT WARRANTY OR ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR THE INTENDED PURPOSE.
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