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Milodon Megaflow Competition Valves
Valves, Exhaust, Race, Stainless Steel, 1.81 in. Diameter, Mopar, Big Block, 383 - 440, Set of 8
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Estimated Ship Date: Nov 2, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
45266-8
Part Type:
Product Line:
Summit Racing Part Number:
MIL-45266-8
UPC:
806621482665
Valve Position:
Exhaust
Exhaust Valve Head Diameter (in.):
1.810 in.
Exhaust Valve Head Diameter (mm):
45.974mm
Exhaust Valve Stem Diameter (in.):
0.371 in.
Exhaust Valve Stem Diameter (mm):
9.42mm
Exhaust Overall Valve Length (in.):
4.900 in.
Exhaust Overall Valve Length (mm):
124.460mm
Undercut Stem:
Yes
Swirl-Polished:
Yes
Valve Tip Length (in.):
0.280 in.
Valve Tip Length (mm):
7.112mm
Valve Material:
21-4N stainless steel
Lock Groove Quantity:
1-groove
Lock Groove Style:
Conventional
Valve Head Style:
12 degree dish
Valve Seat Width (in.):
0.090 in.
Quantity:
Sold as a set of 8.
Milodon Megaflow Competition Valves
No other racing valve on the market has superior materials, is lighter or will flow more than Milodon Megaflow racing valves, as proven by multiple independent engine builders and independent laboratories. These competition valves are forged from one piece of 21-4N stainless steel. They have swirl-polished heads, undercut stems for better gas flow, and tulipped underhead areas for weight savings. With their hardened stellite tips and 1,600 degree F temperature capabilities, they can withstand both high-heat and high-valvetrain stress loads.
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