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.

In-Store Pickup Location

MSD Pro-Billet Distributors 85551

Distributor, Pro-Billet, Magnetic Trigger, Mechanical 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
WARNING: Cancer and Reproductive Harm For more information, visit www.P65warnings.ca.gov.

Brand: MSD Ignition

Manufacturer's Part Number: 85551

Part Type: Distributors

Product Line: MSD Pro-Billet Distributors

Summit Racing Part Number: MSD-85551

UPC: 085132855513

Computer-Controlled Compatible: No

Trigger Style: Magnetic

Advance Type: Mechanical

Ignition Box Required: Yes

Cap Style: Male/HEI

Mechanical Tach Drive: No

Slip Collar: No

Distributor Gear Material: Iron

Distributor Gear Rotation: Standard

Distributor Cap Color: Red

Housing Material: Billet aluminum

Housing Finish: Natural

Marine Use: No

Quantity: Sold individually.

Notes: Distributor is 6.9375 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 distributors share the same CNC machining techniques as the rest of the MSD distributor line. They feature a housing that's machined from high-quality 6061-T6 aluminum for durability and show-quality looks. Their oversized shaft receives a QPQ coating for friction reduction and corrosion resistance, with the added strength of two sealed ball bearings that guide the shaft accurately at well over 10,000 rpm. An extra-long sintered bushing replaces the ball bearing at the bottom of Chevrolet models. TIG-welded on top of the polished steel shaft is MSD's accurate mechanical advance assembly. The weights are supported by nylon pads that allow the advance to operate smoothly throughout the rpm range.

For all-out racing, the advance mechanism can also be easily locked out. To accurately trigger the ignition, a high-output magnetic pickup is bolted to the base. This pickup produces a precise trigger signal that will never vary more than one degree at any rpm. A durable gear is installed for performance applications, and an MSD red cap with brass terminals and race rotor is supplied. They're available in standard and small diameter models for applications with limited clearance, and require the use of a separate ignition box such as an MSD 6, 7, 8, or 10 Series ignition.

Warranty

Questions & Answers Ask a Product Question
Q:

Would you recommend this distributor for a 500hp stroked engine combined with the 6AL-2 and the blaster 2 coil for dragracing or is there a better one?

Asked by ALEXANDER on June 19, 2017

A:

Thank you for your question. MSD Ignition 85551 would work well with your application.

Summit RacingSummit Racing Answer - August 02, 2017

+See All Answers (15) Answer This Question

Q:

Required parts shows a 6AL box. Will this run fine with a 6A box (6200) on a Chevy 350 set up?

Asked by BILL on December 31, 2017

A:

Yes it will work with a 6a

JIMMY from TX answered on January 11, 2018

+See All Answers (11) Answer This Question

Q:

Will the gear on this be compatible with a blueprint 383 roller cam? Also, will this distributor work with Fitech EFI for timing control? Do I still need the ignition box for that application?

Asked by ANTHONY on November 22, 2017

A:

Yes it will. No I already have a ignition box

DONALD from GA answered on November 23, 2017

+See All Answers (7) Answer This Question

Q:

Will the gear of the 85551 work together with my Trick Flow Track Max Camshafts or do i have to replace it?

Asked by ALEXANDER on June 22, 2017

A:

I would put a bronze gear on it!

TRAVIS from AL answered on June 26, 2017

+See All Answers (3) Answer This Question

+See All Questions (33)

Most Helpful Reviews Review This Product

78 Customer Reviews for MSD Ignition 85551 - MSD Pro-Billet Distributors

Average Customer Review

5 Star

(68)

4 Star

(7)

3 Star

(1)

2 Star

(1)

1 Star

(1)

+See All 78 Reviews

MSD Pro-Billet Distributors 85551

Summit RacingSummit Racing Verified Purchase

MSD-85551
I have installed dozens of these distributors on both customer and personal vehicles. The quality and performance is second to none. I will continue using all MSD products. Thanks

6 of 6 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.

Cancel

Reviewer: from CA

Date: March 18, 2014

Appearance
Ease of Installation
Price/Value
Quality

Seems alright

Summit RacingSummit Racing Verified Purchase

MSD-85551
Not much of an improvement performance wise in a street car over a cheap big cap HEI distributor using an MSD Blaster coil powered with the MSD 6AL electronic ignition. It is made fairly well, but it's nothing special other than having no up and down slop in the shaft. Timing probably doesn't drift. I bought it because it is much smaller and lighter than a big cap HEI, and looks better to me. I was hoping for slightly better street manners at lower speeds, but no improvement there. Nice to be able to modify the advance curve relatively easily. However with a spring kit you can do the same thing with a less pricey big cap unit. I dinged it a star, because I just don't see the quality improvement over other similar off shore built products I was hoping to see. And it made no difference in how my car ran. It was already running pretty good apparently. ...read more

4 of 8 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.

Cancel

Reviewer: from WA

Date: April 22, 2016

Appearance
Ease of Installation
Price/Value
Quality

Fits well, better than HEI

Summit RacingSummit Racing Verified Purchase

MSD-85551
I replaced the old HEI and went all brand new MSD. Here is a picture to give you an idea of how it looks after install, '69 Chevelle w/ BBC

3 of 3 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.

Cancel

Reviewer: from CA

Date: November 05, 2016

Appearance
Ease of Installation
Price/Value
Quality

Best distributor!

Summit RacingSummit Racing Verified Purchase

MSD-85551
You can't go wrong with a MSD distributor! Best on the market!

1 of 1 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.

Cancel

Reviewer: from PA

Date: January 04, 2016

Appearance
Ease of Installation
Price/Value
Quality

MSD

Summit RacingSummit Racing Verified Purchase

MSD-85551
Nothing but good things to say when it comes to MSD or Summit. I've never had a problem with one of these.

1 of 1 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.

Cancel

Reviewer: from TX

Date: December 07, 2015

Appearance
Ease of Installation
Price/Value
Quality

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