The Champion RN12YC Spark Plug, shown against a white background, is ideal for Harley-Davidson Shovelhead and Evolution engines. Brand: Champion.

Champion RN12YC Spark Plugs for Harley-Davidson Shovelhead and Evolution

$16.83

SKU: 108-0063

/
  • Low stock - 1 item left
  • Inventory on the way
  • Hassle-free 90 Day Returns
  • Free USA Shipping for Orders Over $99*
  • Free Tech Support M-F 8:30am-4:30pm EST
  • Fast Shipping—No Backorders, No Drop Shipping, No BS

Champion RN12YC Spark Plugs for Harley-Davidson Shovelhead and Big Twin Evolution

Whether it's time for a tuneup or you're troubleshooting an acute ignition problem, these Champion spark plugs will restore lost ignition performance.

  • Copper core
  • Zinc-plated shell for corrosion-resistance
  • Resistor for suppression of electromagnetic interference
  • Sold as a pack of four
  • 1975-1998 Harley-Davidson Big Twin
  • For Shovelheads requiring long-reach plugs only
  • 108-0063; replaces RN12YC, 5R6A, 32311-83, 32-3500, 18033

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

California: ⚠️WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Trending Products

Three TC Bros. Pro Series Truss Digital Gauge Pullback Risers for Harley-Davidson Softail (2018-2024) in gold, black, and silver are upright against a white background, showcasing their durable style.
Three TC Bros. Pro Series Truss Digital Gauge Pullback Risers for Harley-Davidson Softail (2018-2024) in gold, black, and silver are upright against a white background, showcasing their durable style.
TC Bros.
TC Bros. Pro Series Truss Digital Gauge Pullback Riser for Harley-Davidson Softail 2018-2024
from $549.95
Close-up of the TC Bros. Pro Series Truss Pullback Riser for Harley-Davidson, featuring exposed bolts and cables against a blurred outdoor background. Crafted from billet aluminum, this TC Bros. riser offers rugged style and durability.
Close-up of the TC Bros. Pro Series Truss Pullback Riser for Harley-Davidson, featuring exposed bolts and cables against a blurred outdoor background. Crafted from billet aluminum, this TC Bros. riser offers rugged style and durability.
TC Bros.
TC Bros. Pro Series Truss Pullback Riser for Harley-Davidson
from $499.95
Four TC Bros. Pro Series Modular Pullback Risers for Harley-Davidson, in black and silver finishes, stand upright in two rows against a white background.
Four TC Bros. Pro Series Modular Pullback Risers for Harley-Davidson, in black and silver finishes, stand upright in two rows against a white background.
TC Bros.
TC Bros. Pro Series Modular Pullback Risers for Harley-Davidson
$374.95
32 reviews
The TC Bros. Test Bundle Product Big Twin Hardtail Kit features a metal bicycle frame with a sloped top tube and assorted hardware—perfect for chopper builds or achieving classic TC Bros. hardtail style, all displayed on a clean white background.
The TC Bros. Test Bundle Product Big Twin Hardtail Kit features a metal bicycle frame with a sloped top tube and assorted hardware—perfect for chopper builds or achieving classic TC Bros. hardtail style, all displayed on a clean white background.
TC Bros.
TC Bros. Weld-On Hardtail Kit for 1982-2003 Harley-Davidson Sportster w/ Stock Width Tire
$429.95
136 reviews
The TC Bros. Mid Controls Deluxe Kit for 1991-2017 Harley-Davidson Dyna includes black metal brackets, a rod, bolts, washers, nuts, and small hardware—ideal parts for customizing your bike—displayed on a white background.
The TC Bros. Mid Controls Deluxe Kit for 1991-2017 Harley-Davidson Dyna includes black metal brackets, a rod, bolts, washers, nuts, and small hardware—ideal parts for customizing your bike—displayed on a white background.
TC Bros.
TC Bros. Mid Controls Kit for 1991-2017 Harley-Davidson Dyna (Select Your Pegs)
$374.95
14 reviews
Two TC Bros. 11.8" front floating brake rotors for 2006-2025 Harley-Davidson, one with a wavy edge and one with a round edge, both featuring circular cutouts and bolt holes, are displayed on a white background.
Two TC Bros. 11.8" front floating brake rotors for 2006-2025 Harley-Davidson, one with a wavy edge and one with a round edge, both featuring circular cutouts and bolt holes, are displayed on a white background.
TC Bros.
TC Bros. 11.8" Front Floating Brake Rotor for 2006-2025 Harley-Davidson
from $174.95
5 reviews
Moto Iron® 40 Spoke 21" × 2.15" Front Chopper Spool Wheels—one black rim, one chrome—are displayed next to bold "21'' SPOOL" text.
Moto Iron® 40 Spoke 21" × 2.15" Front Chopper Spool Wheels—one black rim, one chrome—are displayed next to bold "21'' SPOOL" text.
Moto Iron®
Moto Iron 40 Spoke 21" × 2.15" Front Chopper Spool Wheel
$274.95
115 reviews
The TC Bros. 12.6" Oversized Front Floating Brake Rotors for 2000-Up Harley-Davidson wheels feature black centers, ventilated silver 420 stainless steel rings (one round, one wavy edge), and are ideal upgrades by TC Bros.
The TC Bros. 11.5" Profile Front Floating Brake Rotor for 2000-2014 Harley-Davidson features a stainless steel friction surface, black center hub, and multiple mounting holes, demonstrating TC Bros.' precision engineering and durable construction.
TC Bros.
TC Bros. 11.5" Front Floating Brake Rotor for 2000-2014 Harley-Davidson
from $174.95
3 reviews
The TC Bros. Mid Controls Kit for 1991-2003 Harley-Davidson Sportster features metal foot pegs and a gear shift lever, perfect for upgrading your bike. Components are arranged on a white background.
The TC Bros. Mid Controls Kit for 1991-2003 Harley-Davidson Sportster features metal foot pegs and a gear shift lever, perfect for upgrading your bike. Components are arranged on a white background.
TC Bros.
TC Bros. Mid Controls Kit for 1991-2003 Harley-Davidson Sportster
$299.95
66 reviews
The TC Bros. Front Crash Bar for Harley-Davidson M-8 Softail w/ Mid Controls is a black metal engine guard, shown with mounting hardware—bolts, washers, spacers, and brackets—ideal for added protection on your Softail.
The TC Bros. Front Crash Bar for Harley-Davidson M-8 Softail w/ Mid Controls is a black metal engine guard, shown with mounting hardware—bolts, washers, spacers, and brackets—ideal for added protection on your Softail.
TC Bros.
TC Bros. Front Crash Bar for Harley-Davidson M-8 Softail w/ Mid Controls
$349.95
View all
View all
16 products