MSD's DynaForce Starter is built to crank over high-compression race engines even in extreme heat. A three horsepower motor drives a reduced 4.4:1 gear set for strong torque at the ring gear, while a downsized housing clears most headers and oil pans. The billet mount can be clocked to different positions for tight header clearance, and the assembly is powder coated to hold up underneath the car.
Specifications:
- Voltage: 12V
- Engine Fitment: Ford Small Block 289-302-351 Windsor
- Bell Housing Fitment: 4.084 in. I.D. Registry Hole
- Ring Gear Depth: 3/4 in. (fits 157 and 164 tooth flywheels)
- Product Type: Starter Motor
- Part Number: 5090
Fits bell housing and engine block plates with a 4.084 inch I.D. registry hole.
FAQ
What engines does the MSD 5090 starter fit?
It's built for Ford small block 289-302-351 Windsor engines with bell housing or block plates using a 4.084 inch I.D. registry hole.
What flywheels does this starter work with?
The 3/4 inch ring gear depth works with both 157 and 164 tooth flywheels.
What gear ratio does the DynaForce Starter use?
A reduced 4.4:1 gear set driven by a three horsepower motor for strong cranking torque.
Will this starter clear my headers?
The downsized housing clears most headers and oil pans, and the billet mount can be clocked to different positions to help in tight applications.

