Indian & Polaris Engine Cylinder Head Plug M12X1.5 7055604

Genuine Indian & Polaris Engine Cylinder Head Plug M12X1.5 — OEM Part #7055604

Skip the hardware-store guesswork. The genuine Indian & Polaris Engine Cylinder Head Plug M12X1.5 matches the original thread pitch, length, strength and finish, so it fits your Indian motorcycle the first time and holds under vibration.

OEM hardware is engineered for a specific location and load. The wrong grade, length or finish can strip threads, loosen with vibration or look out of place on a show-quality bike. Because Indian and Polaris are both Polaris Inc. brands, this part number is shared across Indian motorcycles and Polaris off-road vehicles. Every model it fits is listed below.

Engine Cylinder Head Plug M12X1.5 at a Glance

• OEM part number: 7055604
• Brand: Indian & Polaris (genuine Polaris-made OEM part)
• Part type: Plug
• Indian fitment: 101 Scout, Scout, Sport and Super, 2025
• Polaris off-road fitment: RZR, 2024–2026
• Condition: New

Models and Years This Engine Cylinder Head Plug M12X1.5 Fits

Genuine part #7055604 fits the models and years below, across Indian motorcycles and Polaris off-road vehicles. To be certain, match the part number to the factory parts diagram for your machine or contact us with your VIN before ordering.

Indian Motorcycle Fitment

Polaris Off-Road Vehicle Fitment

17 Polaris model variants share this part, grouped here by model family.

Yes, a motorcycle part can fit an ATV or side-by-side: Polaris uses many of the same fasteners, seals, filters and electrical parts across its motorcycle and off-road lines, so this part number also appears in the Polaris off-road parts catalog.

Why Choose a Genuine Indian & Polaris OEM Engine Cylinder Head Plug M12X1.5?

• Exact factory size, thread pitch and length
• Correct strength grade for its location
• Factory chrome, black or plated finish
• No guessing at metric sizes
• Sold by Witchdoctors, an Indian and Victory OEM parts specialist

Features and Materials

Key Features

• Genuine Indian & Polaris OEM hardware, part #7055604
• Matches the original thread, length, head style and grade
• Corrosion-resistant finish
• Used across several Indian assemblies, as listed in the fitment table
• Ideal for replacing lost, stripped or one-time-use fasteners

Materials and Construction

Indian fasteners are heat-treated alloy or carbon steel, or stainless steel where appearance and corrosion resistance matter, with chrome, black oxide or zinc finishes. Grommets, bushings and O-rings are rubber or polymer.

Common Reasons Riders Replace This Part

• Replacing hardware that vibrated loose
• Replacing stripped, rusted or rounded fasteners
• Rebuilds that call for new one-time-use hardware
• Replacing hardened grommets that cause rattles

Signs Your Engine Cylinder Head Plug M12X1.5 Needs Replacing

• Rounded heads or damaged threads
• Rust or pitted chrome
• Missing hardware or rattling panels
• Cracked or hardened grommets
• Self-locking nuts that were already reused

Installation Tips

1. Check the Indian parts diagram for the location and quantity.
2. Clean threads in the mating part.
3. Use thread locker only where the service manual specifies.
4. Start fasteners by hand to avoid cross-threading.
5. Torque to the factory spec.

Not sure whether to tackle it yourself? Read when to seek professional help or DIY before you start.

Parts Diagrams for Your Bike

Find part #7055604 and every part installed with it in the factory parts diagrams for your model:

• All Indian Motorcycle OEM parts diagrams

Related OEM Parts for the Same Bikes

Doing the job right? These genuine parts fit the same models and are often replaced at the same time:

• Indian Flat Washer M12X2.5 (#7557236)
• Indian Hex Flange Head Screw, M6X1.0X35 (#7521331-35)
• Indian Hex Flange Head Screw, M10X1.5X25 (#7521333-25)
• Indian Dowel Pin, M10X14 (#7662309)

Recommended Accessories and Maintenance Supplies

Pair your Engine Cylinder Head Plug M12X1.5 with these parts and supplies:

• Motorcycle hardware — Fasteners and hardware kits
• Essential maintenance items — Maintenance parts
• Garage tools — Torque wrenches and tools
• Factory OEM repair parts — More OEM repair parts
• Indian Scout parts — more parts for your Scout
• Polaris off-road OEM parts — for your Polaris ATV or side-by-side

Helpful Guides from the Witchdoctors Blog

• Spring Tune-Up for Your Victory or Indian Motorcycle: Get Ready to Ride
• Victory & Indian Motorcycle Spring Inspection Checklist

Frequently Asked Questions

What is the OEM part number for this Indian & Polaris Engine Cylinder Head Plug M12X1.5?

The genuine part number is 7055604. Use it to match this part to your factory parts diagram.

Which Indian motorcycles does part #7055604 fit?

It fits the Indian 101 Scout (2025); Indian Scout Bobber (2025); Indian Scout Classic (2025); Indian Scout Sixty Bobber (2025); Indian Scout Sixty Classic (2025); Indian Sport Scout (2025); Indian Sport Scout Sixty (2025); Indian Super Scout (2025).

Does it fit Polaris ATVs or side-by-sides?

Yes. The same part number is used on 17 Polaris off-road models, including the RZR. See the Polaris table above.

Is this a genuine OEM part?

Yes. This is a genuine Polaris-made OEM part, the same part number used at the factory for Indian and Polaris models, not an aftermarket copy.

Can I use a hardware-store bolt?

Grade, pitch, length and finish often differ. For brakes, suspension and engine parts, use the specified OEM fastener.

Is this sold individually?

This listing is for the part number shown. Check the diagram for the quantity used.

Order Your Genuine Indian & Polaris Engine Cylinder Head Plug M12X1.5 Today

Keep your Indian motorcycle or Polaris off-road vehicle on the road. Add the genuine Indian & Polaris Engine Cylinder Head Plug M12X1.5 (part #7055604) to your cart today, and order the related parts above at the same time so you can finish the job in one go.

• How long will it take to receive my order?
• Shipping and return policy
• Questions about fitment? Contact us
• Shop all Indian OEM parts

Where to Ride Your Indian

Put fresh parts to work on two of America's great motorcycle roads. Check road conditions, seasonal closures and park rules before you go.

• Triple Nickel (OH 555) — southeast Ohio: rolling hills and blind crests near Zanesville
• Spearfish Canyon Scenic Byway — near Sturgis, South Dakota: a limestone canyon ride a short hop from Sturgis