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SUMAX WIRES SP 8MM RED 18+ ST

$ 66.95

In stock

Spark Plug Wire – 8 mm – Red

Part #: 21040357

SUMAX quality guaranteed.

Available for ship to store or drop ship.


Free Shipping on New Part orders over $100

SUMAX WIRES SP 8MM RED 18+ ST

Product Specifications

Weight 0.50 lbs
Part Number

21040357

Punctuated Part Number

2104-0357

Vendor Part Number

S30238

Vendor Punctuated Part Number

S30238

Commodity Code

2104

Commodity Group

ELECTRICAL SYSTEM GROUP

Commodity Type

PLUG WIRE GROUP

MPN

21040357

Brand

SUMAX

Knobtown Cycle proudly offers the SUMAX WIRES SP 8MM RED 18+ ST. Your Kansas City motorcycle parts experts for over 40 years.

Product Description

WIRES SP 8MM RED 18+ ST

  • Precut and have the plug/coil boots and terminals already installed
  • Boots and wires are made from extra-high-temperature silicon, which gives protection up to 600°F
  • Spiro-Pro core provides up to 10 times the conductivity of a standard carbon-core wire
  • Low resistance means they run cooler and last three to four times longer than carbon-core wires
  • Made in the USA

Part Locations

Location Available
Wisconsin (WI) 9
New York (NY) 0
Texas (TX) 0
Nevada (NV) 0
North Carolina (NC) 0
National Total 9

Stock levels last updated: December 26, 2025 2:04 AM

Professional Installation Available

Knobtown Cycle offers professional installation services. Contact us via a service request to learn more.


Thank you for Shopping at Knobtown Cycle!

When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.

Kit Fox – Owner Knobtown Cycle

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Need help with installation?  Our Service Department based in Kansas City, Missouri is here for you.  Fill out a Service Request and lets get you rolling!