SUMAX WIRES SP PRO BLK 18+ ST
$ 89.95
In stock
Spark Plug Wires – 10.4 mm – Black
Part #: 21040364
SUMAX quality guaranteed.
Available for ship to store or drop ship.
SUMAX WIRES SP PRO BLK 18+ ST
Product Specifications
| Weight | 0.50 lbs |
|---|---|
| Part Number | 21040364 |
| Punctuated Part Number | 2104-0364 |
| Vendor Part Number | S49038 |
| Vendor Punctuated Part Number | S49038 |
| Commodity Code | 2104 |
| Commodity Group | ELECTRICAL SYSTEM GROUP |
| Commodity Type | PLUG WIRE GROUP |
| MPN | 21040364 |
| Brand | SUMAX |
Upgrade your ride with the SUMAX WIRES SP PRO BLK 18+ ST from Knobtown Cycle, Kansas City’s premier motorcycle parts destination.
Product Description
WIRES SP PRO BLK 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) | 2 |
| New York (NY) | 0 |
| Texas (TX) | 0 |
| Nevada (NV) | 0 |
| North Carolina (NC) | 0 |
| National Total | 2 |
Stock levels last updated: December 26, 2025 2:00 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.
Product Reviews
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!



Reviews
There are no reviews yet.