Upgrade your copper/nickel spark plugs to modern materials such as iridium or platinum. This small change increase mileage twice and more.
Manufacturer recommendations do not apply for modded engines, so you need to adjust your plugs for new operating conditions.
Oftentimes there is a better product than OEM plugs in terms of value.
Using improved electrode design you increasing efficiency of combustion, therefore squeezing a bit more power.
Spark plugs are not created equal. There are plenty outdated spark plugs - they are OEM, works fine, but there are just better options out there. Modern spark plugs are made of better materials, have better design and are more reliable. We rate spark plugs by their electrode design and materials.
How we rateWe use multi-source and characteristics compatability to provide the most comprehensive list of alternative spark plugs.
How we cross-referenceSpark plugs manufacturers publish cross-referencing table with products from another manufacturers. We find them, saving to database and cross-referencing by all of them.
Car manufacturers include OEM spark plugs part code to their manuals. We find original spark plug code and include it to our system for further operations.
There are several websites that provide information on cross-reference and/or car fitment information. We monitor them and save the data from multiple sources in centralized database.
There plenty interchangeable spark plugs with similar characteristics that are not included to any cross-reference chart, so we also compare characteristics to confirm interchangeability.