Search
Advanced Search
Free Shipping on eligible itemsFree Shipping on eligible items
My Cart

Ruthenium HX Car Engine Parts Online

From air filters to fuel delivery, online engine parts are essential for automotive repairs, maintenance, and even performance upgrades. Whether you’re an experienced mechanic or automotive enthusiast working on your daily driver or restoring a classic, Sixity Auto has you covered. Dive into our catalog below to find the car engine parts you need to keep your vehicle running smoothly.

Select Your Vehicle

Filter By Part Details
Clear All
View as Grid List

Items 1-48 of 1661

Set Ascending Direction
  1. NGK Spark Plug
    6 pc NGK Ruthenium HX 95605 LTR7BHX Spark Plugs
    Special Price $62.12 Regular Price $88.99
    NGK / NTK
  2. NGK Spark Plug
    NGK Ruthenium HX 95605 LTR7BHX Spark Plug
    Rating:
    100%
    1  Review
    Special Price $11.08 Regular Price $15.99
    NGK / NTK
  3. NGK Spark Plug
    6 pc NGK Ruthenium HX 90495 LTR6BHX Spark Plugs
    Rating:
    80%
    1  Review
    Special Price $62.12 Regular Price $88.99
    NGK / NTK
  4. NGK Spark Plug
    4 pc NGK Ruthenium HX 95605 LTR7BHX Spark Plugs
    Special Price $41.71 Regular Price $59.99
    NGK / NTK
  5. NGK Spark Plug
    8 pc NGK Ruthenium HX Spark Plugs for 2018-2021 Ford F-150 5.0L V8
    Rating:
    100%
    1  Review
    Special Price $97.73 Regular Price $139.99
    NGK / NTK
  6. NGK Spark Plug
    NGK Ruthenium HX 95839 FR5AHX Spark Plug
    Special Price $11.31 Regular Price $15.99
    NGK / NTK
  7. NGK Spark Plug
    NGK Ruthenium HX 93420 LFR6BHX Spark Plug
    Special Price $11.08 Regular Price $15.99
    NGK / NTK
  8. NGK Spark Plug
    4 pc NGK Ruthenium HX 96358 LKR7AHX-S Spark Plugs
    Special Price $42.56 Regular Price $60.99
    NGK / NTK
  9. NGK Spark Plug
    8 pc NGK Ruthenium HX Spark Plugs for 2014-2020 Chevrolet Silverado 1500 5.3L 6.2L V8
    Special Price $99.72 Regular Price $141.99
    NGK / NTK
  10. NGK Spark Plug
    4 pc NGK Ruthenium HX 95125 LFER7BHX Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $41.71 Regular Price $59.99
    NGK / NTK
  11. NGK Spark Plug
    6 pc NGK Ruthenium HX Spark Plugs for 2008-2016 Toyota Highlander 3.5L V6
    Special Price $76.82 Regular Price $109.99
    NGK / NTK
  12. NGK Spark Plug
    8 pc NGK Ruthenium HX 96355 LFR5AHX Spark Plugs
    Rating:
    60%
    2  Reviews
    Special Price $84.23 Regular Price $119.99
    NGK / NTK
  13. NGK Spark Plug
    8 pc NGK Ruthenium HX 95605 LTR7BHX Spark Plugs
    Special Price $84.23 Regular Price $119.99
    NGK / NTK
  14. NGK Spark Plug
    6 pc NGK Ruthenium HX 96358 LKR7AHX-S Spark Plugs
    Special Price $62.12 Regular Price $88.99
    NGK / NTK
  15. NGK Spark Plug
    6 pc NGK Ruthenium HX Spark Plugs for 2015-2019 Ford F-150 2.7L V6
    Special Price $75.14 Regular Price $106.99
    NGK / NTK
  16. NGK Spark Plug
    4 pc NGK Ruthenium HX 91784 LKAR8BHX Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $42.56 Regular Price $60.99
    NGK / NTK
  17. NGK Spark Plug
    6 pc NGK Ruthenium HX Spark Plugs for 2005-2015 Toyota Tacoma 4.0L V6
    Special Price $76.82 Regular Price $109.99
    NGK / NTK
  18. NGK Spark Plug
    NGK Ruthenium HX 92274 LKAR7AHX-S Spark Plug
    Special Price $11.08 Regular Price $15.99
    NGK / NTK
  19. NGK Spark Plug
    NGK Ruthenium HX 95125 LFER7BHX Spark Plug
    Special Price $11.08 Regular Price $15.99
    NGK / NTK
  20. NGK Spark Plug
    6 pc NGK Ruthenium HX 96355 LFR5AHX Spark Plugs
    Special Price $62.12 Regular Price $88.99
    NGK / NTK
  21. NGK Spark Plug
    8 pc NGK Ruthenium HX 94567 TR5AHX Spark Plugs
    Special Price $82.54 Regular Price $117.99
    NGK / NTK
  22. NGK Spark Plug
    6 pc NGK Ruthenium HX 91784 LKAR8BHX Spark Plugs
    Special Price $62.12 Regular Price $88.99
    NGK / NTK
  23. NGK Spark Plug
    6 pc NGK Ruthenium HX Spark Plugs for 2011-2019 Ford F-150 3.5L V6
    Special Price $75.14 Regular Price $106.99
    NGK / NTK
  24. NGK Spark Plug
    NGK Ruthenium HX 94122 LFR6AHX-S Spark Plug
    Special Price $11.08 Regular Price $15.99
    NGK / NTK
  25. NGK Spark Plug
    NGK Ruthenium HX 91276 LTR6AHX Spark Plug
    Special Price $11.31 Regular Price $15.99
    NGK / NTK
  26. NGK Spark Plug
    6 pc NGK Ruthenium HX Spark Plugs for 2011-2021 Ford F-150 3.3L 3.5L 3.7L V6
    Special Price $76.67 Regular Price $109.99
    NGK / NTK
  27. NGK Spark Plug
    6 pc NGK Ruthenium HX Spark Plugs for 2006-2017 Lexus IS350 3.5L V6
    Special Price $76.82 Regular Price $109.99
    NGK / NTK
  28. NGK Spark Plug
    8 pc NGK Ruthenium HX 90220 LTR5AHX Spark Plugs
    Special Price $84.23 Regular Price $119.99
    NGK / NTK
  29. NGK Spark Plug
    NGK Ruthenium HX 96355 LFR5AHX Spark Plug
    Special Price $11.31 Regular Price $15.99
    NGK / NTK
  30. NGK Spark Plug
    8 pc NGK Ruthenium HX 91276 LTR6AHX Spark Plugs
    Special Price $84.23 Regular Price $119.99
    NGK / NTK
  31. NGK Spark Plug
    4 pc NGK Ruthenium HX 92400 FR7BHX-S Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $41.71 Regular Price $59.99
    NGK / NTK
  32. NGK Spark Plug
    4 pc NGK Ruthenium HX Spark Plugs for 2015-2021 Ford Mustang 2.3L L4
    Special Price $52.55 Regular Price $74.99
    NGK / NTK
  33. NGK Spark Plug
    4 pc NGK Ruthenium HX 90495 LTR6BHX Spark Plugs
    Rating:
    100%
    1  Review
    Special Price $41.71 Regular Price $59.99
    NGK / NTK
  34. NGK Spark Plug
    4 pc NGK Ruthenium HX 96355 LFR5AHX Spark Plugs
    Special Price $41.71 Regular Price $59.99
    NGK / NTK
  35. NGK Spark Plug
    16 pc NGK Ruthenium HX Spark Plugs for 2009-2020 Dodge Charger 5.7L V8
    Special Price $189.20 Regular Price $269.99
    NGK / NTK
  36. NGK Spark Plug
    8 pc NGK Ruthenium HX 90495 LTR6BHX Spark Plugs
    Special Price $84.23 Regular Price $119.99
    NGK / NTK
  37. NGK Spark Plug
    8 pc NGK Ruthenium HX Spark Plugs for 2014-2020 GMC Sierra 1500 5.3L 6.2L V8
    Special Price $97.73 Regular Price $139.99
    NGK / NTK
  38. NGK Spark Plug
    NGK Ruthenium HX 96358 LKR7AHX-S Spark Plug
    Special Price $11.08 Regular Price $15.99
    NGK / NTK
  39. NGK Spark Plug
    4 pc NGK Ruthenium HX 90220 LTR5AHX Spark Plugs
    Special Price $41.71 Regular Price $59.99
    NGK / NTK
  40. NGK Spark Plug
    8 pc NGK Ruthenium HX Spark Plugs for 1997-2013 Chevrolet Corvette 5.7L 6.0L 6.2L V8
    Special Price $99.34 Regular Price $141.99
    NGK / NTK
  41. NGK Spark Plug
    6 pc NGK Ruthenium HX Spark Plugs for 2011-2017 Ford Mustang 3.7L V6
    Special Price $76.67 Regular Price $109.99
    NGK / NTK
  42. NGK Spark Plug
    16 pc NGK Ruthenium HX Spark Plugs for 2011-2020 Ram 2500 5.7L 6.4L V8
    Special Price $189.20 Regular Price $269.99
    NGK / NTK
  43. NGK Spark Plug
    6 pc NGK Ruthenium HX 94122 LFR6AHX-S Spark Plugs
    Special Price $63.40 Regular Price $90.99
    NGK / NTK
  44. NGK Spark Plug
    6 pc NGK Ruthenium HX 94279 FR6AHX-S Spark Plugs
    Rating:
    100%
    2  Reviews
    Special Price $62.12 Regular Price $88.99
    NGK / NTK
  45. NGK Spark Plug
    16 pc NGK Ruthenium HX Spark Plugs for 2009-2020 Dodge Durango 5.7L V8
    Special Price $189.20 Regular Price $269.99
    NGK / NTK
  46. NGK Spark Plug
    4 pc NGK Ruthenium HX 95839 FR5AHX Spark Plugs
    Special Price $41.71 Regular Price $59.99
    NGK / NTK
  47. NGK Spark Plug
    6 pc NGK Ruthenium HX 95125 LFER7BHX Spark Plugs
    Special Price $63.40 Regular Price $90.99
    NGK / NTK
  48. NGK Spark Plug
    6 pc NGK Ruthenium HX Spark Plugs for 2008-2013 Infiniti G37 3.7L V6
    Special Price $76.53 Regular Price $108.99
    NGK / NTK
Page
per page

High-Quality Engine Parts for Your Motor Vehicle

Sixity Auto works with top brands to build our inventory of OEM-quality engine parts online, ensuring you have access to reliable and cost-effective components. We promise that every part fits as advertised and meets or exceeds expectations. 

We want to make sure that whether you’re performing routine maintenance or making a major repair, you can find the best parts at a fair price. Our focus is always on delivering affordable solutions without compromising the strict tolerances for your vehicle’s longevity. 

Fast, Reliable Shipping

We know that when you order car engine parts, you need them right away. Our network of US warehouses enables us to offer fast, dependable shipping across the US, with 99% of orders shipping within one business day. Many of the items in our catalog also come with free shipping. 

A Reputation You Can Count On

Sixity Auto has been in business for over 20 years and has shipped over 10 million engine parts from our online storefront. Our customers praise our products and timely delivery. If you have any questions about us or our inventory, contact our US-based customer service department. We’re happy to be of service.

Frequently Asked Questions

How fast will your engine parts arrive?

Timing is a top priority. We use our extensive network of warehouses to ensure speedy delivery, with most orders shipping within one business day. That said, the exact delivery time will depend on the parts ordered, your location, and the delivery options selected during checkout.

Are the parts on Sixity Auto comparable to what I’d find in a store?

Absolutely! We stock only top-quality OEM-replacement auto parts that meet or exceed original equipment specifications. The crucial difference between Sixity Auto and the other guys is price. We offer these high-quality parts at prices typically lower than those at your local auto parts store.

Do you offer any discounts for the engine parts sold online?

Yes. We’re proud to offer a 10% discount on everything for military personnel. 

Filter By Part Details
Now Shopping by
  1. Sub-Brand
    Ruthenium HX
Clear All
Shopping Options
free shipping on eligible items at sixityauto.com

FAST & FREE SHIPPING
On eligible items

At SixityAuto.com, we offer free shipping on thousands of eligible items. We also ship FAST. Over 99% of all items ordered will ship within one business day. Plus, we ship from our strategically located warehouses on the East and West Coast to save precious shipping time.

100% fitment guarantee at sixityauto.com

100% FITMENT GUARANTEE
Your parts will fit as advertised

Shop with confidence, knowing that your purchase from Sixity Auto will fit your vehicle. If after purchase you determine that your part does not fit the vehicle we advertised, simply contact us to initiate a return. We want your parts to fit!

5-star customer rated at sitejabber

RAVE REVIEWS
5-Star Rated on Sitejabber

Don't take it from us - check out our feedback from our customers! Sixity Auto has partnered with Sitejabber, the industry leader in tracking customer loyalty and feedback, to bring genuine product and customer service reviews.

Plus read thousands of authentic reviews on Trustpilot, Google, Reseller Ratings, the Better Business Bureau, and more!

call sixity auto 8am to 8pm Eastern, Monday through Friday

WE'RE HERE TO HELP
(888) 679-6279
Monday through Friday, 8am-8pm Eastern

We speak your language. Our staff has decades of experience selling auto parts to enthusiasts like you. Whether it's for your car, truck, or van, we have staff on hand that can answer your questions and make sure you get the part you're looking for.

For phone sales or help with product fitment questions, our U.S.-based customer service staff in California and Indiana is available weekdays, 8am-8pm ET.

tax exempt shopping available for businesses

BUILT FOR BUSINESS
Tax-exempt shopping available

Sixity Auto works with a wide range of business customers—from repair shops and dealerships to fleet operators, government organizations, and others that purchase parts for resale or operational use.

If you are a qualified tax-exempt or resale customer, submit your documentation and we'll set you up for tax-free shopping. Check out all the details here.

military members and vets save 10% every day

MILITARY DISCOUNT
Save 10% on every purchase

Sixity Auto is proud to support our Active-Duty Service Members, Vets, and their immediate families. To show a token of our thanks, we extend a 10% discount on your entire purchase, every single day.

We use VerifyPass (formerly ID Discount) to help us manage our Military Discount program. Click here for all the details!

Sixity PaymentsSixity Payments
A+ Rated by BBBA+ Rated by BBB
SecurityMetrics card safe certification logo

© 2026 Sixity, Inc. Part of Proximity Group, an American-owned and operated online retailer. All Rights Reserved.

© 2026 Sixity, Inc. Part of Proximity Group, an American-owned and operated online retailer. All Rights Reserved.