MSD 85551 Pro-Billet Distributor
- Chevrolet V8 distributor, billet aluminum housing
- 6061-T6 aluminum housing machined on a CNC
- C.A.R.B. approved, E.O. D-40-22
- .500 inch steel shaft with sealed ball bearing
- Needs an MSD Blaster, 6, 7, 8 or 10 ignition control
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A billet Chevy V8 distributor with a magnetic pickup and tunable mechanical advance, approved for California emissions rules. It has no internal module, so it must be paired with an MSD ignition box.
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ASIN: B000182DUGModel: 85551Category: Distributors
Overview
A Chevrolet V8 engine bay running an MSD ignition box gets this billet aluminum distributor. A magnetic pickup triggers the spark, and an adjustable mechanical advance with supplied springs and stop bushings lets you tune the curve.
The CNC machined housing, sealed bearing and coated shaft are aimed at high rpm stability, and the C.A.R.B. approval helps in states with emissions rules. Separate ignition hardware is required, so it adds to the build.
Who it's for
Matched to Chevy V8 engines with an MSD Blaster or one of the listed numbered MSD ignition controls, especially builds that need to stay emissions legal. Owners wanting a single-box setup should look at a ready-to-run unit.
Pros and cons
- Billet aluminum housing, CNC machined
- Maintenance-free magnetic pickup
- Adjustable mechanical advance with springs
- C.A.R.B. approved for emissions
- Needs a separate MSD ignition control
- Chevy V8 fitment only
- Advance curve needs tuning by the owner
Performance notes
A precision reluctor on the shaft triggers the magnetic pickup, which has no moving parts to wear or adjust. The advance assembly lets you tune an advance curve with the supplied springs and stop bushings. A sealed ball bearing and a long sintered bushing support the shaft at high rpm, and O-ring seals help with modified blocks.
Specifications
| Model | 85551 |
|---|---|
| Dimensions & fit | |
| Shaft diameter | .500 inch |
| Weight | 4.3 pounds |
| Dimensions | 17.8 x 6.9 x 6.8 inches |
| Construction & materials | |
| Housing | 6061-T6 billet aluminum |
| Other details | |
| Engine fit | Chevrolet V8 |
| Exterior | Machined |
| Ignition requirement | MSD Blaster, 6, 7, 8 or 10 ignition control |
| Emissions | C.A.R.B. approved, E.O. D-40-22 |
| Part number | MSD-85551 |
Frequently asked questions
Does the MSD 85551 have a built-in ignition module?
No. The description says it must be used with an MSD Blaster Ignition or an MSD 6, 7, 8 or 10 Ignition Control.
Is the MSD 85551 legal in California?
The description lists it as C.A.R.B. approved under E.O. D-40-22.
What engines does the MSD 85551 fit?
The description says it is for Chevy V-8 engines.