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STANDARD MOTOR PRODUCTS RELAY STRT/BRK 31504-91A

$ 14.95

In stock

Relay

Part #: 21100374

STANDARD MOTOR PRODUCTS quality guaranteed.

Available for ship to store or drop ship.

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STANDARD MOTOR PRODUCTS RELAY STRT/BRK 31504-91A

Product Specifications

Weight 0.10 lbs
Part Number

21100374
UPC Code

091769325428
Punctuated Part Number

2110-0374
Vendor Part Number

MCRLY4
Vendor Punctuated Part Number

MC-RLY4
Commodity Code

2110
Commodity Group

ELECTRICAL SYSTEM GROUP
Commodity Type

STARTER GROUP
MPN

21100374
Brand

STANDARD MOTOR PRODUCTS
UPC

091769325428
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Upgrade your ride with the STANDARD MOTOR PRODUCTS RELAY STRT/BRK 31504-91A from Knobtown Cycle, Kansas City’s premier motorcycle parts destination.

Product Description

RELAY STRT/BRK 31504-91A

Part Locations

Location Available
Wisconsin (WI) 20+
New York (NY) 20+
Texas (TX) 8
Nevada (NV) 1
North Carolina (NC) 6
National Total 20+

Stock levels last updated: December 26, 2025 2:51 AM

Professional Installation Available

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

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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!