SET YOUR CAR

Kartboy Aluminum Crank Pulley

MODEL # KAR KB-050
Manufacturer Part # KB-050

$85.00

MSRP: $100.00

FREE SHIPPING ON ALL ORDERS OVER $200.00!



Description
One of the benefits of a Subaru boxer engine is that they respond well to lightweight crank pulleys. Kartboy’s crank pulley is a great option for you WRX/STI owners. Think of it as having a lightweight flywheel, you’re going to reduce the rotational mass and strain on the engine. 



Please note on the confirmed applications list that these will also work on several other Subaru models. Make sure you have your car entered in the year, make, and model function.



The Kartboy aluminum crank pulley is black in finish, and weighs in at 2.38lbs. 

SHARE THIS
| | | | |

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.


SPECIFICATIONS

Brand: Kartboy
Color: Black
Location: Crank
Material: Aluminum
Pulley Ratio: Stock
Weight: 2.38lbs
Mfgr. Warranty: Limited Lifetime Warranty
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
RallySport Guarantee

4

5 STAR
75%
4 STAR
3 STAR
2 STAR
1 STAR
25%
This product has no user uploaded media. You can upload your photo or video of your install by posting a review.

Noticeable Difference
Michael N. 4 months ago
I installed this on my car after I had to replace the timing belt. With my car being a 4EAT there was a noticeable difference after it was installed. I experienced no issues with idle. I would recommend this to be installed. It is an easy mod to do.

Don't do this unless you get it balanced with the crankshaft...
Père Foura 1 year ago
Install this, first of all I notice no power gain, the idle was not stable and the engine was vibrating. I would not recommand that product unless you fully built your engine and get it balanced with the crankshaft.
Verified Purchase

REV FASTER
JDM-STI 4 years ago
First, im a bit skeptical in putting underweight crank pulley for my EJ207. After talking to Rick, Im convinced it will not do harm to my engine. After installation, damn i like this crank pulley. The engine rev more faster now and its good to know that this crank pulley is not as light as other aftermarket one that might cause the CEL light due to lighter weight. LOVE THIS MOD!!!
Verified Purchase

Crank Pulley
vwbeaner 5 years ago
I had this put on when I had my timing belt done. The motor seems to rev up faster and easier. Probably the easiest and cheapest way to make the car a little faster Would you recommend this to a friend: Yes

  • Q: CEL with WRX flywheel and this pulley?  Robot Doctor 2 years ago

    Answer

    I have a 2008 Legacy GT, and am going to be installing the Competition Clutch Stage 2 Steelback Brass Plus Clutch Kit w/ Flywheel Subaru Models (inc. 2006-2014 WRX / 2005-2009 Legacy GT) I also am doing the timing belt, the Tomei downpipe, Invidia catback and Cobb Access Port at the same time. Will the combination of the Kartboy pulley and the lighter WRX flywheel cause CELs? Thanks!


    • A: You shouldn't see any CEL, however with the combination of the lightweight flywheel we can't guarantee it.


      Kyle A. 2 years ago
  • Q: Rad Pull  ccracing_3438958 2 years ago

    Answer

    Will I have to pull out the radiator to install this?


    • A: You should not have to remove your radiator for installation.


      Kyle A. 2 years ago
  • Q: Tune?  justinpozzolo53115 4 years ago

    Answer

    Can this just be a bolt on or do I need a tune do to faster revs?


    • A: Lightweight crank pulleys do not require a tune and you can just bolt this on and be good to go.


      Zach G. 4 years ago
  • Q: Weight  Subiesuperlover 4 years ago

    Answer

    May I know the actual weight of this product, and do they (cobb, grimspeed, this one) weight the same?


    • A: These are estimated weights from our scale, the weights might show slightly different on another scale. Stock - 5.56LBS Kartboy - 2.36LBS GrimmSpeed - 2.02LBS Cobb - 1.24LBS


      Tanner S. 4 years ago
Subaru Forester
Base 1998, 1999, 2000, 2001, 2002L 1998, 1999, 2000, 2001, 2002S 1998, 1999, 2000, 2001, 2002X 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010XS 2003, 2004, 2005XT 2004, 2005, 2009XS L.L. Bean Edition 2005XT Premium 2005, 2010, 2011, 2012, 2013X L.L. Bean Edition 2006, 2007, 2008XT Limited 2006, 2007, 2008, 2009, 2010Sports 2.5 X 2008Sports 2.5 XT 2008X Limited 2009, 2010X Premium 2009, 2010XT Touring 2011, 2012, 2013
Subaru Impreza
Base 1993, 1994, 1995L 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001LS 1993, 1994LX 1995, 1996Outback 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004Brighton 1996, 1997RS 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005TS 2002, 2003, 2004WRX 2002, 2003, 2004, 2005, 2006, 2007WRX STI 2004, 2005, 2006, 2007Outback Sport 2005, 2006, 2007, 2008, 2009, 2010, 20112.5i 2006, 2007WRX TR 2006, 2007WRX Limited 2006, 2007WRX STI Limited 2007WRX Sedan 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX Hatchback 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX STI Hatchback 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX STI Special Edition Hatchback 2010WRX Premium Sedan 2010, 2011, 2012, 2013, 2014WRX Premium Hatchback 2010, 2011, 2012, 2013, 2014WRX Limited Sedan 2010, 2011, 2012, 2013, 2014WRX Limited Hatchback 2010, 2011, 2012, 2013, 2014WRX STI Limited Sedan 2011, 2012, 2013, 2014WRX STI Limited Hatchback 2011, 2012, 2013, 2014WRX STI Sedan 2011, 2012, 2013, 20142.5i Sedan 2008, 2009, 2010, 20112.5i Hatchback 2008, 2009, 2010, 20112.5i Premium Sedan 2010, 20112.5i Premium Hatchback 2010, 2011
Subaru Legacy
Touring 1994GT 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006L 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004Alpine Sport 1994Sun Sport 1994Outdoor 1994LS 1994, 1995, 1996LSi 1994, 1995, 1996, 1997Sport 1994Base 1995Brighton 1995, 1996, 1997, 1998, 1999, 2000Outback 1995, 1996, 1997, 1998, 1999Postal 1995, 1996, 1997, 1998Outback Limited 1997, 1999GT Limited 1998, 2000, 2001, 2002, 2005, 2007, 2008, 2009L 30th Anniversary 1999Limited 30th Anniversary 1999SUS 30th Anniversary 1999L SE 2003L 35th Anniversary 2004i 2005Limited 2005GT spec.B 2006, 2007, 2008, 20092.5i 2006, 2008, 20092.5i Limited 2007, 2008, 20092.5i Special Edition 2007, 2008
Subaru Outback
Limited 2000, 2001, 2002, 2003, 2004, 2005Base 2000, 2001, 2002, 2003, 2004, 2008i 2005XT 2005, 2006XT Limited 2005, 2007, 2008, 20092.5i 2006, 2007, 2008, 20092.5i Limited 2006, 2007, 2008, 20092.5i Basic 20072.5i L.L. Bean Edition 20082.5i Limited L.L. Bean Edition 2008
Subaru Baja
Base 2003Sport 2003, 2004, 2005, 2006Turbo 2004, 2005, 2006
Subaru WRX STI
Base 2015, 2016, 2017Limited 2015, 2016, 2017Launch Edition 2015Series.HyperBlue 2016