MINI MINI (R50/R53/R52) I MINI I (R50/R53) PHASE 2 3P 2004-07->2006-09 1.6i 205 16V Komp (149kW) -W11B16A- A6 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 NGK is the brand leader in the UK spark plug market and are the world's 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. PORSCHE 911 (997) V 911 CARRERA V COUPE (997) PHASE 1 2P 2004-07->2008-07 3.6i 325 F6 24V 4X4 (239kW) -M9605- M6

PORSCHE 911 (997) V 911 TARGA V (997) PHASE 1 2P 2006-08->2008-07 3.8i 355 F6 24V 4X4 (261kW) -M9701- M6

An 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! PORSCHE 911 (997) V 911 CARRERA V CABRIOLET (997) PHASE 1 2P 2005-04->2008-07 3.8i 355 F6 24V (261kW) -M9701- A5

MINI MINI (R50/R53/R52) I MINI I CABRIOLET (R52) 2P 2004-07->2009-03 1.6i 205 16V Komp (149kW) -W11B16A- A6 The BKR7EQUP's are dearer due to being the JCW plug I think and only one step down, and are a good plug. PersonallyPORSCHE 911 (996) IV 911 CARRERA IV COUPE (996) 2P 1998-02->2005-06 3.6i 320 F6 24V 4X4 (235kW) -M9603- M6 Question 4: is although the Iridium is seen to be the performance spark plug, the fitting of the Iridium spark plug itself will not give any power performance gain, many people report, that when they changed from Platinum to Iridium, they felt a livelier throttle response, in fact what you will have done is simply, renew old tired spark plugs with fresh new spark plugs, the ignition system now performing as it should do, thanks to the change of tired old, for new fresh, the material change in the case of Platinum to Iridium has played no difference! The other question (Q1) will be answered as you read on, Platinum and Iridium is used for it's hardness and resistance to wear, this gives longevity between service intervals, with Iridium being the harder of the two, PORSCHE 911 (997) V 911 TARGA V (997) PHASE 1 2P 2006-08->2008-07 3.8i 381 F6 24V 4X4 (280kW) -M9701S- A5 PORSCHE CAYMAN (987) I CAYMAN I (987) PHASE 1 3P 2005-11->2009-12 2.7i 210 F6 24V (155kW) -M9720- M6 PORSCHE CAYMAN (987) I CAYMAN I (987) PHASE 1 3P 2005-11->2009-12 2.7i 245 F6 24V (180kW) -M9720- M5

PORSCHE 911 (997) V 911 CARRERA V COUPE (997) PHASE 1 2P 2004-07->2008-07 3.8i 381 F6 24V 4X4 (280kW) -M9701S- M6 PORSCHE 911 (997) V 911 CARRERA V COUPE (997) PHASE 1 2P 2004-07->2008-07 3.8i 355 F6 24V (261kW) -M9701- A5 It's actually more the other way around really, contrary to much advice about, notably on fb but sometimes on here, you need a map with any pulley really. Not with all cams. Manufacturers don't seem to want us to be included in the ownership process; there seems to be a 'dark veil' surrounding the act of questioning their decisions: ...'filled for life'...'they all run hot'...'they all need premium plus fuel'...'manufacturer fluids only'...with dire consequences of warranty violation. PORSCHE 911 (997) V 911 CARRERA V CABRIOLET (997) PHASE 1 2P 2005-04->2008-07 3.6i 325 F6 24V (239kW) -M9605- M6PORSCHE 911 (997) V 911 CARRERA V COUPE (997) PHASE 1 2P 2004-07->2008-07 3.8i 355 F6 24V 4X4 (261kW) -M9701- M6 There 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 (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 TARGA V (997) PHASE 1 2P 2006-08->2008-07 3.8i 355 F6 24V 4X4 (261kW) -M9701- A5

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 rePORSCHE 911 (996) IV 911 CARRERA IV CABRIOLET (996) 2P 1998-02->2005-06 3.6i 345 F6 24V (254kW) -M9603S- M6