JavaScript Disabled

Your JavaScript appears to be disabled. JavaScript is necessary for various functions, such as order checkout, to operate on this web site. Please ensure that JavaScript is enabled.

Outdated Internet Browser Detected

Your web browser appears to be out of date. Soon you will not be able to create a secure connection to our web site using TLS 1.0. Please upgrade your browser from current version( ). Learn more about TLS.

Always Save More at Summit!
In-Store Pickup Location

MSD Pro-Billet Locked-Out Distributors 85505

Make sure this fits your vehicle:

Distributor, Pro-Billet, Magnetic Trigger, Locked Advance, Chevy, Big/Small Block, Each

Estimated Ship Date: Loading...Processing Today Would you rather pick it up? Select Location

  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

Hazardous Material Warning
WARNING: Cancer and Reproductive Harm For more information, visit

Brand: MSD Ignition

Manufacturer's Part Number: 85505

Part Type: Distributors

Product Line: MSD Pro-Billet Locked-Out Distributors

Summit Racing Part Number: MSD-85505

UPC: 085132855056

Computer-Controlled Compatible: No

Trigger Style: Magnetic

Advance Type: Locked

Ignition Box Required: Yes

Cap Style: Male/HEI

Mechanical Tach Drive: No

Slip Collar: Yes

Distributor Gear Material: Bronze

Distributor Gear Rotation: Standard

Distributor Cap Color: Black

Housing Material: Billet aluminum

Housing Finish: Black

Marine Use: No

Quantity: Sold individually.

Notes: Distributor is 6.875 - 7.375 in. tall from engine to top of distributor cap.

CARB EO Number: D-40-39 (pdf)
To see a list of qualifying vehicles, enter CARB EO Number D-40-39

Emissions: California EO Approved

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

MSD Pro-Billet locked-out distributors are built from strong billet aluminum for engines that run locked-out timing or an MSD timing computer. With no advance assembly, the rotor plate is welded directly to the oversized shaft. A sealed ball bearing guides the top of the shaft, while an extra-long sintered bushing stabilizes the lower portion. This extra support ensures stable and accurate timing signals throughout your engine's entire rpm range. Trigger signals are produced via a high-output magnetic pickup. This pickup is extremely accurate and never requires adjustment. A precision-manufactured reluctor is responsible for triggering the pickup. Since this distributors are designed primarily for race engines, an oversized (+.006 in.) bronze gear is installed, along with an adjustable slip collar for modified blocks, heads, or intake manifolds.


Most Helpful Reviews Review This Product

1 Customer Reviews for MSD Ignition 85505 - MSD Pro-Billet Locked-Out Distributors

Average Customer Review

5 Star


4 Star


3 Star


2 Star


1 Star


+See All 1 Reviews

Great product!

Summit RacingSummit Racing Verified Purchase

MSD delivers with a great product again!

0 of 0 found this review helpful.

report abuse

Report Abuse X

If you feel that this review is inappropriate and should be removed from the site, report it to us by clicking the "Report Abuse" button below.


Reviewer: from TN

Date: February 28, 2018

Ease of Installation
Questions & Answers Ask a Product Question

There are no questions for this product.

Some parts are not legal for use in California or other states with similar laws / regulations

Back To Results
Email this page
Sign Up for Email X