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COMETIC Head Gasket - 4.125 - .040" C9743

Part Number: 09340790
COMETIC
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SKU:
09340790
MPN:
C9743
Condition:
New
Availability:
Ships Same Business Day
Weight:
0.34 LBS
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MSRP: $61.90
Now: $58.00
Was: $61.90
— You save $3.90
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Description

A quality head gasket is critical to maintaining proper combustion chamber sealing under extreme pressure and temperature—failure here cascades into lost compression, coolant leaks, and catastrophic engine damage. The COMETIC C9743 uses multi-layer steel construction with precision embossments to distribute load evenly across the gasket surface, reducing bore distortion and maximizing ring seal integrity for consistent power output. If you're building or rebuilding a high-performance engine, this gasket delivers the reliability and precision fit that serious racers and engine builders demand.

  • Bore diameter: 4.125"
  • Thickness: .040"
  • Construction: Multi-Layer Steel (MLS)
  • Core material: Uncoated stainless steel
  • Surface coating: Viton (both sides)
  • Load Control Embossments (LCE)
  • Even torque distribution
  • Reduced bore distortion
  • Enhanced piston ring seal
  • Variable shim layer options
  • Harsh environment rated
  • Made in USA
  • MPN: C9743
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Specs

THICKNESS IMPERIAL:
0,040'
THICKNESS METRIC:
1.02 MM
RIDING STYLE:
STREET
TYPE:
CYLINDER HEAD
MATERIAL:
LAYERED STEEL
THICKNESS:
1,02 MM (0,040')
BORE SIZE:
4,125'
BORE SIZE IMPERIAL:
4.125'
PRODUCT NAME:
GASKET
UNITS:
PAIR
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Fitment for COMETIC Head Gasket - 4.125 - .040" C9743

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Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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