Moroso® 73631 - Ultra 40™ Race Wire Set

2 reviews|Item # mpn1453210583 View Similar Products
Manufactured - Ships in 5 to 7 days
Custom Built / Racing
Fitment Notes:
  • Fits Models with Ford Small Block 289-302 CID Engine
    Fits Models without HEI Style Distributor Cap
  • Not Vehicle Specific. May require professional installation. Typically used with custom built or racing vehicles
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Product Details

Ultra 40™ Race Wire Set (73631) by Moroso®. With this quality part backed by a great price, you can enjoy your vehicle so much more than you thought was possible. This Moroso part is specifically engineered to make your vehicle run better. If you are looking for premium quality equipment to attach to your precious vehicle, look no further than Moroso.


Sleeve Attachment Style: Sleeved
Conductor Style: Spiral Core
Type: Custom Fit
Distributor Terminal End: Female/Socket
Spark Plug Boot End: 135 Degree
Resistance: 40 Ohms Per Ft
Distributor Boot Material: Silicone
Spark Plug Boot Material: Silicone
Assembled: Yes
RFI Suppression: Yes
Coil Wire Included: Yes
Diameter: 8.65 mm
Quantity: Sold As One Kit
Wire Color: Blue
Boot Finish: Gray


  • 8.65mm diameter wire with 40 ohms of resistance per foot
  • Sleeving adds extra dielectric strength which is wire’s ability to not be affected by outside electrical pulses
  • Sleeving extends spark plug wire life and protects against exhaust header heat, chaffing and contaminants
  • Complete, ready to install sets available for specific engines


  • 8 x 135 Degree

Need more power under the hood? Want to get more out of your vehicle? You may need more Moroso. Driven by passion for racing Moroso provides drivers with quality high-performance products at a reasonable price. Choosing the right components for your vehicle's systems is critical to its reliability, and will extend the life of your vehicle. Moroso parts are designed with only one goal – performance. Moroso's highly skilled staff coupled with their highly accurate machining processes result in a product that guarantees only premium quality. Whether you are a motorsport racer or a street-legal car enthusiast – Moroso has the right part to suit your needs.

Moroso® is one of the world's leading manufacturers of automotive parts and components for racing and street performance applications. Moroso offers a wide range of products from oil pans and oiling systems, to ignition components, valve covers, fuel system equipment, air cleaners, hard-core racing tools, chassis and suspension equipment. The company was founded in 1968 by Dick Moroso, who was featured by Hot Rod magazine as one of the 100 most influential people in the history of drag racing. Moroso products are widely recognized in the performance world because they are expertly made for racers - by a racer!

Part Number:


The limited warranty is extended only to each individual who purchases Moroso products. To obtain the benefit of this limited warranty, Moroso should receive the product no later than forty-five (45) days after the date it was purchased. If the product is found by Moroso to be defective in either material or workmanship, Moroso shall either repair or replace the product, at its election and at its sole cost. Moroso will attempt to repair or replace any defective product within sixty (60) days after receipt.

This limited warranty does not cover or apply to any damage sustained to the vehicle, engine or other parts which may have been caused by the defective product and does not cover or apply to any personal injury, labor charges or any other incidental costs or damages caused by the defective product.

This limited warranty is the only express warranty which applies to Moroso products and is expressly given in lieu of any other warranty expressed or implied, including that of merchantability. Any implied warranty including that of merchantability and/or fitness for a particular purpose is hereby limited by the same terms and time limitations set forth in this limited express warranty and otherwise excluded.

You may have rights under either state or federal law, including laws governing warranties, which you should consult. Except for those obligations assumed herein, Moroso Performance Products, Inc. assumes no other obligations in connection with the sale of its products.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

This part is custom built / racing
  • Fits Models with Ford Small Block 289-302 CID Engine
  • Fits Models without HEI Style Distributor Cap
  • Not Vehicle Specific. May require professional installation. Typically used with custom built or racing vehicles



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Moroso® - Ultra 40™ Race Wire Set
Moroso® 73631 - Ultra 40™ Race Wire Set
Average Rating: 4.8 of 5
4.8 of 5
Good Installation
Great wires! Fit perfectly and totally worth the price I payed for them. I could immediately feel the difference in engine response. Wire separators are helpful to keep wires evenly spaced. Tight fitting boots at the plugs are great. Thick insulating sleeve protects well against heat and chaffing.
Posted by (Blaine, WA) / 1997 Chevy Camaro
Was this review helpful for you? Yes
4.8 of 5
I ordered these because I heard they are the most powerful wires available for racing today. I have had nothing but amazing performance out of my blue wires by Moroso. I like that I can cut my wires to make them fit perfectly. When it comes to racing products, I think that no one can beat Moroso here. Totally recommend the product.
Posted by (Williamsville, NY) /
Was this review helpful for you? Yes
Low Prices Price match guarantee
Guaranteed Fitment Always the correct part
In-House Experts We know our products
Easy Returns Quick & Hassle Free

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