Outrun MFG.
M177 1 Step Colder Spark Plug
M177 1 Step Colder Spark Plug
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Designed specifically for the M177 engine, these 1 step colder spark plugs pair perfectly with our Stage 2 ECU Tuning and downpipes. Allowing for a colder, and tighter spark pattern to allow for higher horsepower, and no detonation.
It is very typical of higher horsepower AMG's to develop a misfire as the factory plug cannot handle the additional spark demand. We have seen this many times after a car is tuned, the client returns a few weeks later with a complaint of a misfire; a quick swap of the plugs to our 1 step colder version and the car has no more issues.
Please email us with your Year and Model to confirm fitment prior to purchase.
*Sold in a set of 8*
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![M177 1 Step Colder Spark Plug](http://www.outrunmfg.com/cdn/shop/files/DSC03354.jpg?v=1709314744&width=1445)
![M177 1 Step Colder Spark Plug](http://www.outrunmfg.com/cdn/shop/files/DSC03309.jpg?v=1709314745&width=1445)
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