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In-Store Pickup Location

MSD Pro-Billet Distributors 8578

Make sure this fits your vehicle:

Distributor, Pro-Billet, Magnetic Trigger, Mechanical Advance, Ford, 351W, Each

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  • 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
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WARNING: Cancer and Reproductive Harm For more information, visit www.P65warnings.ca.gov.

Brand: MSD Ignition

Manufacturer's Part Number: 8578

Part Type: Distributors

Product Line: MSD Pro-Billet Distributors

Summit Racing Part Number: MSD-8578

UPC: 085132085781

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: Small base diameter for extra clearance. Distributor is 7.875 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:

So many to look at with all the different kinds .is this msd. Would it work with my 351W it’s some what stock the only performance part I put in it is a COMPCAM thumper to get a nice sound. We did port out the heads and got them polish the Rest are stock and all new.

Asked by DAVID on April 17, 2019

A:

It should work, I'm running it in a 351W/395 Stroker and it works fine.

JOHAN from CA answered on April 20, 2019

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Q:

Will this work with a Vic jr intake?

Asked by CHRIS on February 24, 2019

A:

Thank you for your question. The MSD Ignition 8578 distributor is compatible with the Edelbrock Victor Jr intake manifold.

Summit RacingSummit Racing Answer - April 01, 2019

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Q:

What brass gear fits this?

Asked by JOHN on March 14, 2019

A:

John, MSD part number 8585 is the bronze gear that fits the 8578 distributor.

MSD Ignition MSD Ignition Answer - March 18, 2019

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Q:

does the ECM need to be reprogramed with this unit or is it install and go

Asked by MICHAEL on December 10, 2018

A:

I'm running a MSD 6AL Box and it was a drop and go. Make sure to see if you need the brass gear instead of the gear it comes with to avoid prematurely wearing the cam gear.

JOHAN from CA answered on December 10, 2018

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+See All Questions (7)

Most Helpful Reviews Review This Product

13 Customer Reviews for MSD Ignition 8578 - MSD Pro-Billet Distributors

Average Customer Review

5 Star

(10)

4 Star

(2)

3 Star

(0)

2 Star

(0)

1 Star

(1)

+See All 13 Reviews

MSD Pro Billet 8578

Summit RacingSummit Racing Verified Purchase

MSD-8578
Looking forward to getting this installed. Finish and detail are very high quality. The smaller size is handy. I expect this Distributor to give me long dependable service. I am disappointed however that in order to use to Distributor with my Roller Cam, I have to purchase an expensive replacement drive gear. Then pay to get it installed. The value kind of disappears all of a sudden. Another little twist. Why doesn't MSD offer this Distributor with the Melonized Gear installed. Lots of Guys are building Roller motors. ...read more

4 of 4 found this review helpful.

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Reviewer: from IL

Date: May 01, 2014

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Ease of Installation
Price/Value
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MSD 8578 distributor

Summit RacingSummit Racing Verified Purchase

MSD-8578
This is my first MSD distributor, replacing a pro comp that came with the engine and failed. It was easy to install, but the two wire leads were not long enough so cutting and soldering longer wire required. I tried the factory setting for a baseline and the motor fired right up (427 windsor stroker 600 HP). This motor dos'nt like a lot of advance, about 27-28 degrees total 10 initial.. Factory setting was ok, no detonation but performance not quite there. It is easy to change the timing curve on this distributor and after a few spring and bushing changes I have the optimal advance curve. The motor makes power, no pinging and runs and idles smooth. Some other reviewers stated they needed a brass gear, I emailed the tech people was told with my hydraulic roller cam set up the stock gear was acceptable. ...read more

2 of 2 found this review helpful.

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Reviewer: from CA

Date: March 23, 2015

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Distributor

Summit RacingSummit Racing Verified Purchase

MSD-8578
It fits it works. Disappointed that you have to buy a steel gear for a roller cam, instead of a purchase option. Otherwise it's an MSD, enough said.

2 of 2 found this review helpful.

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Reviewer: from AZ

Date: April 10, 2014

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Msd

Summit RacingSummit Racing Verified Purchase

MSD-8578
Another great product from msd, had to use this one with victor senior intake

0 of 0 found this review helpful.

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Reviewer: from AL

Date: May 06, 2019

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Quality

Great Replacement

Summit RacingSummit Racing Verified Purchase

MSD-8578
I needed to replace my last one due to an ignition and carburetor problem and this was the best way to go.

0 of 0 found this review helpful.

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Reviewer: from CA

Date: November 26, 2018

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

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