NGK Performance Iridium Spark Plug Set

Performance NGK Iridium Spark Plug (Set of 4) for standard and modified vehicles.

These plugs are supplied in various heat ranges and are suitable for all Renault Sports. We have provided a guide below.

When a spark plug is referred to as a “cold plug”, it is one that transfers heat rapidly from the firing tip into the engine head, keeping the firing tip cooler. Keeping the firing tip cooler helps prevent detonation.

Available in 3 heat ranges 6, 7 or 8. The higher the number the colder the plug. A colder plug can tend to foul easily on a car that is used for short periods or commuting. As a rough guide we suggest the below:-

6 Heat Range - Suitable for Standard Clio 2 RS (172/182). For Turbo and Supercharged Cars use the 7 Heat Range.

7 Heat Range - Suitable for Standard and Modified Clio 3 RS (197/200), Megane 2 RS (225/230) and Megane 3 (250/265/275). Ideal for cars up to 320 BHP, if over this level for track use then you may wish to use an 8 Heat Range.

8 Heat Range - Engines over 320 BHP and used mostly on track.

Spark Plug Gap Guide

Gaps should always be checked before fitment, plus different applications may need a reduced gap. As a starting point we have put a guide below.

Upto 200 BHP - 0.9mm
200 - 250 BHP - 0.8mm
250 - 300 BHP - 0.7mm
300 - 350 BHP - 0.65mm

Q) My car is relatively standard, but I do track days. Is there an advantage in fitting this Spark Plug Set?
A) In short no. Although some heat ratings are suitable for standard cars, you will not see any benefit in performance over a good stock set of plugs. That said the set is keenly priced and in most instance cheaper than the OEM factory plug.

Find more products like this in: