Nivo88t

There are a few options for the TT guys. BTW the PFR6B-11C is shorter than the PFR6B-11B by 1 mm. PFR6B-11C PFR6B-11B Left is the Yttrium triple ground electrode Brisk Extra Turbo Racing DOR15YTE-1 Middle is the Brisk Silver Racing DOR15YS Right is OEM TT spark plug Here is a standard projection NGK iridium VS the Brisk Silver: The factory has 19mm reach as does the Brisk. The Brisk has 3mm shell so it is 22mm projection into head. The OEM PFR5B-11B has a 3.5mm shell for a 22.5mm projection into head. From NGK: PFR5B-11B X = 50.5mm (ISO) Y = 6.5mm from last thread to center electrode top Z = 3.5mm Metal Shell projection Measurements PFR5B-11B Platinum Length from top to shell end - 73.03 mm Length from top to electrode end - 78.59 mm Full Reach - 22.53 mm DOR15YS Silver Length from top to shell end - 72.45 mm Length from top to electrode end - 77.31 mm Full Reach - 22.03 mm DOR15YTE-1 Yttrium triple electrode Length from top to shell end - 72.28 mm Length from top to electrode end - 77.40 mm Full Reach - 22.03 mm SKJ20DR-M11 Denso Length from top to shell end - 70.14 mm Length from top to electrode end - 77.08 mm Full Reach - 20.64 mm BKR7EIX-11 Iridium Length from top to shell end - 70.03 mm Length from top to electrode end - 75.98 mm Full Reach - 19.03 mm Here are the measurements of the 2 new Denso spark plugs: PK20GR8 Denso (3326) - Pics included Length from top to shell end - 72.50 mm Length from top to electrode end - 78.75 mm Full Reach - 22.03 mm SK20BGR11 Denso (3472) Length from top to shell end - 72.28 mm Length from top to electrode end - 79.15 mm Full Reach - 22.00 mm

I did a little write up on mine... link here for the .pdf file

There are a few options for the TT guys. BTW the PFR6B-11C is shorter than the PFR6B-11B by 1 mm. PFR6B-11C PFR6B-11B Left is the Yttrium triple ground electrode Brisk Extra Turbo Racing DOR15YTE-1 Middle is the Brisk Silver Racing DOR15YS Right is OEM TT spark plug Here is a standard projection NGK iridium VS the Brisk Silver: The factory has 19mm reach as does the Brisk. The Brisk has 3mm shell so it is 22mm projection into head. The OEM PFR5B-11B has a 3.5mm shell for a 22.5mm projection into head. From NGK: PFR5B-11B X = 50.5mm (ISO) Y = 6.5mm from last thread to center electrode top Z = 3.5mm Metal Shell projection Measurements PFR5B-11B Platinum Length from top to shell end - 73.03 mm Length from top to electrode end - 78.59 mm Full Reach - 22.53 mm DOR15YS Silver Length from top to shell end - 72.45 mm Length from top to electrode end - 77.31 mm Full Reach - 22.03 mm DOR15YTE-1 Yttrium triple electrode Length from top to shell end - 72.28 mm Length from top to electrode end - 77.40 mm Full Reach - 22.03 mm SKJ20DR-M11 Denso Length from top to shell end - 70.14 mm Length from top to electrode end - 77.08 mm Full Reach - 20.64 mm BKR7EIX-11 Iridium Length from top to shell end - 70.03 mm Length from top to electrode end - 75.98 mm Full Reach - 19.03 mm Here are the measurements of the 2 new Denso spark plugs: PK20GR8 Denso (3326) - Pics included Length from top to shell end - 72.50 mm Length from top to electrode end - 78.75 mm Full Reach - 22.03 mm SK20BGR11 Denso (3472) Length from top to shell end - 72.28 mm Length from top to electrode end - 79.15 mm Full Reach - 22.00 mm