UPDATE:
Check here for a complete DIY guide for the NST pulley kit for the 2006 SI
http://www.8thcivic.com/forums/showthread.php?t=25328
^^ awesome write up ^^
And as some supplemental information, this stuff was posted on the TSX forums a few days ago so I decided to copy and paste it here for you guys.
The Acura TSX and new Honda Civic SI use THE SAME CRANK AND ALTERNATOR PULLEYS so these pics and info will be applicable to the K20 in the Civic SI.
Copy and pasted:
Long story short, I found out my old buddy Mike from http://www.NonStopTuning.com was in the process of building some new pulleys for the TSX and offered my car for testing. From the NST website...
The NST Acura TSX pulley kit increases horsepower via great weight reduction and the underdriving of accessories. Superior to other available kits, NST kits also offer an Overdrive Alternator Pulley to optimize output for stereo system lovers!
^^ This is really a plus for people like me who want to add a nice audio/video system in the future, because the NST alternator pulley will charge the battery and run the electrical system just like the stock setup!!!
Each kit is carefully crafted from 6061-T6 aircraft aluminum, tested and balanced to high tolerances. Every NST pulley is hard anodized for exceptional durability and is available in a choice of colors: Red, Blue, or Graphite Gray.
Here are a couple pics...
Installation pictures for the DIY guys...
On the Dynojet...
Dyno Charts or STFU...
The blue lines are stock, red lines are NST lines...
BADASS, NST FTW :thumb:
Check here for a complete DIY guide for the NST pulley kit for the 2006 SI
http://www.8thcivic.com/forums/showthread.php?t=25328
^^ awesome write up ^^
And as some supplemental information, this stuff was posted on the TSX forums a few days ago so I decided to copy and paste it here for you guys.
The Acura TSX and new Honda Civic SI use THE SAME CRANK AND ALTERNATOR PULLEYS so these pics and info will be applicable to the K20 in the Civic SI.
Copy and pasted:
Long story short, I found out my old buddy Mike from http://www.NonStopTuning.com was in the process of building some new pulleys for the TSX and offered my car for testing. From the NST website...
The NST Acura TSX pulley kit increases horsepower via great weight reduction and the underdriving of accessories. Superior to other available kits, NST kits also offer an Overdrive Alternator Pulley to optimize output for stereo system lovers!
^^ This is really a plus for people like me who want to add a nice audio/video system in the future, because the NST alternator pulley will charge the battery and run the electrical system just like the stock setup!!!
Each kit is carefully crafted from 6061-T6 aircraft aluminum, tested and balanced to high tolerances. Every NST pulley is hard anodized for exceptional durability and is available in a choice of colors: Red, Blue, or Graphite Gray.
Here are a couple pics...
Installation pictures for the DIY guys...
On the Dynojet...
Dyno Charts or STFU...
The blue lines are stock, red lines are NST lines...



BADASS, NST FTW :thumb: