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. 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.

BERU Ultra The brand name spark plug in uncompromising OEM quality! Al well-known international car manufacturers use Beru spark plugs and glow plugs in their vehicles. To retain this high quality level when servicing and repairing gasoline engines, we re

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Some of you may well be saying, Why use it at all if what we see/read here is true? As touched upon earlier, Platinum and Iridium are used for their ability to provide longevity between service intervals and the resistance to wear, especially Iridium, that's it. Been looking into spark plugs for my Mini Cooper S and thought it would be of value to document what I have found out. If you know more or have something to add please feel free to do so. Maybe this thread could become a FAQ ? PORSCHE CAYMAN (987) I CAYMAN I (987) PHASE 1 3P 2005-11->2009-12 2.7i 210 F6 24V (155kW) -M9720- M5

PORSCHE 911 (997) V 911 CARRERA V CABRIOLET (997) PHASE 1 2P 2005-04->2008-07 3.8i 381 F6 24V 4X4 (280kW) -M9701S- A5Do we need to be saved from our own stupidity or are there sound economic reasons to be so meekly 'managed' by manufacturers? PORSCHE 911 (997) V 911 CARRERA V CABRIOLET (997) PHASE 1 2P 2005-04->2008-07 3.6i 325 F6 24V (239kW) -M9605- A5 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 911 (997) V 911 TARGA V (997) PHASE 1 2P 2006-08->2008-07 3.6i 325 F6 24V 4X4 (239kW) -M9605- A5

PORSCHE CAYMAN (987) I CAYMAN I (987) PHASE 1 3P 2005-11->2009-12 3.4i 295 F6 24V (217kW) -M9721- A5 PORSCHE 911 (997) V 911 CARRERA V COUPE (997) PHASE 1 2P 2004-07->2008-07 3.6i 325 F6 24V (239kW) -M9605- M6 PORSCHE 911 (997) V 911 CARRERA V CABRIOLET (997) PHASE 1 2P 2005-04->2008-07 3.8i 381 F6 24V (280kW) -M9701S- A5There is a special 'gapping' tool rather like a circular wedge with graduations that can be used to gently increase the gap; decreasing is by a cruder tapping method against the garage wall.) PORSCHE 911 (996) IV 911 CARRERA IV COUPE (996) 2P 1998-02->2005-06 3.6i 345 F6 24V 4X4 (254kW) -M9603S- M6 PORSCHE 911 (997) V 911 CARRERA V CABRIOLET (997) PHASE 1 2P 2005-04->2008-07 3.6i 325 F6 24V 4X4 (239kW) -M9605- M6