NGK (4285 BKR7EQUP Laser Platinum Spark Plug, Pack of 1

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PORSCHE CAYMAN (987) I CAYMAN I (987) PHASE 1 3P 2005-11->2009-12 2.7i 210 F6 24V (155kW) -M9720- M6 PORSCHE 911 (996) IV 911 CARRERA IV CABRIOLET (996) 2P 1998-02->2005-06 3.6i 320 F6 24V (235kW) -M9603- M6 Do not make spark plug changes at the same time as another engine modification such as different injectors/timing changes different boost loadings from your chosen forced induction, as in the event of poor results, it can lead to misleading and inaccurate conclusions, an exception would be when the alternate plugs came as part of a single precalibrated upgrade kit. When making spark plug heat range changes, it is better to err on the side of too cold a plug. The worst thing that can happen from too cold a plug is a fouled spark plug, too hot a spark plug can cause severe engine damage!

MINI MINI (R50/R53/R52) I MINI I (R50/R53) PHASE 2 3P 2004-07->2006-09 1.6i 205 16V Komp (149kW) -W11B16A- A6An unaltered engine will run within the optimum operating range straight from the manufacturer, but if you make modifications such as a turbo, supercharger, increase compression, timing changes, use of alternate racing fuels, or sustained use of nitrous oxide, these can alter the plug tip temperature and may necessitate a colder plug. A rule of thumb is, one heat range colder per modification or one heat range colder for every 75–100hp you increase. In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70 degrees C to 100 degrees C from the combustion chamber!

In both cases these plugs had been factory-fitted and run for ~10 000mls. The electrode gap variation was varied so I (later) cleaned them with a stiff plastic brush and set them 'correctly' (imo) to 0.7mm (advised by a trusted tuning firm) to keep as 'spares'. Gaps ranging from 0.5mm to 1.0mm; can't be right, surely?

Now I've got you thinking, So what's the best spark plug for my Mini? That all depends on what you do with your Mini, and of course your budget, if your Mini is your daily driver and you rely and trust your dealer (they know best!) then you may as well stop reading now, if on the other hand your Mini is your daily driver come weekend warrior, or is just your weekend warrior, and you do your maintenance yourself then read on.

PORSCHE 911 (997) V 911 CARRERA V CABRIOLET (997) PHASE 1 2P 2005-04->2008-07 3.8i 355 F6 24V 4X4 (261kW) -M9701- A5 PORSCHE CAYMAN (987) I CAYMAN I (987) PHASE 1 3P 2005-11->2009-12 2.7i 245 F6 24V (180kW) -M9720- M5 The second generation R55, R56, R57 petrol models are fitted from the factory with the BERU: 12ZR6SP03 with the EXCEPTION of the Cooper S these are fitted with NGK: PLZBR7A-G, and the JCW are fitted with the NGK: ILZKBR7A-8G If you were to take a chance with any of the pulley sizes and no map it'd perhaps be taking less of a risk with an 11%, but the factory felt the need to map for just that size didn't they, so how people come to the conclusion that an even smaller pulley by another 50% of that again needs no map at all I have no idea. BKR6EIX Iridium tip, this is an alternative replacement for the BKR6EQUP with the same heat range (6)

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NGK is the brand leader in the UK spark plug market and are the worlds biggest supplier to many major car manufacturers. Each and every one of their products are designed to meet the most rigorous standards and are the professionals choice because of their quality and technical excellence. Their plugs can be found in use by teams in F1, WRC and MotoGP. Put simply, NGK genuine spark plugs are the workhorse at the heart of smooth-running engines around the world.