Great produce and very easy to install with the instructions that came with the product. Thank you for getting me back on the water.

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Product details
Brand: Sierra
- Delco EST Conversion Kit
- Fits GM V8 engines
- Replaces Crusader 22752, 22752K
GTIN: 808282361020
MPN: 18-5514
All reviews
Defective right out of the box, month later still trying to get replacement parts. Had to purchase another ignition to get boat back on water.
Incredibly simple install on my 5.0 with Bravo 3 outdrive. No interruption switch. Be sure to follow the base timing instructions CAREFULLY! I burned up my new module by starting the engine with the shunt installed. Install the shunt with the engine running. Disconnect if the engine stalls and start the engine before installing the shunt again. I had to purchase a replacement module to run. EST also has a less aggressive timing map than the TBV I removed. (Less top end) but great acceleration out of the hole as my TBV was not advancing.
This works great !Very quick delivery and very professional service!
The module in the new EST ignition conversion kit was defective. They sent out a replacement part at no charge and I had it fixed I 24 hours. Awesome service
Fit our 5.7l mercruiser well. Once install the engine started right up. Highly recommend it.
this is a easy to install and only 2 wires to connect positive and a tach wire. the new coil mounts easily and the connectors plug in. it also has the shunt tool to set the base timing on the est system. great price and easily installed. not a better deal anywhere for the money
Awesome fix for the old Thunderbolt ignition. I found a YouTube video that showed step by step instructions on install and wiring. Only problem is wire from new coil to distributor is about 6” too short. Had to buy a separate wire.
Great delivery. Haven't installed the product yet. From a visual inspection point of everything looks good.
Very simple install. Delivery was on time with what I was told up front.
