Kartboy Big Brake Adapters FHI 2 Pot Rear

Part #: KAR KB-016
( 11 reviews )



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This product is covered by our
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No questions asked 30 day return policy


Brand: Kartboy
Color: Black
Installation Hardware Included: Yes
Location: Rear Caliper
Material: Alumnium
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.
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Subaru Impreza
WRX 2002, 2003, 2004, 2005RS 1998, 1999, 2000, 2001, 2002, 2003, 2004, 20052.5i 2006, 2007
Subaru Legacy
Brighton 2000GT 2000, 2001, 2002, 2003, 2004, 2005, 2006GT Limited 2000, 2001, 2002, 2005, 2007, 2008, 2009L 2000, 2001, 2002, 2003, 2004L 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 Forester
S 2000, 2001, 2002L 2000, 2001, 2002Base 2000, 2001, 2002X 2003, 2004, 2005, 2006, 2007, 2008XS 2003, 2004, 2005XT 2004, 2005XS L.L. Bean Edition 2005XT Premium 2005X L.L. Bean Edition 2006, 2007, 2008XT Limited 2006, 2007, 2008Sports 2.5 X 2008Sports 2.5 XT 2008

One of the many great attributes of the 06-07 WRX is the brakes! If only you could have a set of FHI Calipers on your 02-05 WRX, or GC Impreza then life would be complete! Well now you can do just that.<br></br>

Kartboy has designed a quality big brake adapter so that you can run the FHI Calipers on the rear of your WRX, RS, and some choice Forester and Legacy models. These adapter kits will come provided with all the mounting hardware which includes high grade bolts which will hold up to all the horsepower you will be running.<br></br>

Please note that mounting these calipers also requires the use of 06-07 WRX rear rotors, and of course the proper calipers to make for a complete installation.

REVIEWS ( 11 )


Verified Purchase
mendo_ver735281 4 months ago
I bought these brakets after I was told these would allow me to bolt up the 04 sti rear breaks on my 02 wrx.THIS IS NOT TRUE. they don't work and I have to pay shipping to send them back now and cannot bolt up the rears. Would not recommend. I love RSD but this is crap.

Top Notch Product
Paul Morales 5 months ago
The quality is awesome. The finish is awesome. Comes with all the hardware you will need to bolt them up to your subaru. There is a slight fitment issue but you can't expect it to fit perfect . But the over all fitment/ install isn't to bad. I had them installed on my 2002 wrx with 2007 WRX 2 piston rear calipers. You will have to bend back the rear dust shield in order to fit the new larger vented rear rotor but that isn't a big deal. Some people just take the dust shield completely off by drilling out the spot welds but I just chose to keep mine on. Haven't had any issues yet with it. ****TIP*******: when installing the kart boy bracket install it onto the Caliper first leave the bolts slightly loose to have just alittle wiggly room and then bolt it up to the car. If you install it the other way around you will be there all day trying to get the bolts in. Hope this helps Happy moding
Verified Purchase
Hope you get lucky
kenflo 1 year ago
I've read a few reviews. Some say no fitment issues others say there are. I installed them and definitely had fitment issues with the bolt holes that attach to the e-brake back plate. Not a huge deal to remedy I just think if you're paying this much you shouldn't have to deal with anything. Still a great product and a cheaper alternative to replacing the backing plates with 06-07 plates.
Verified Purchase
Kartboy Big Brake Adapters FHI 2 Pot Rear
JusLiv-_- 1 year ago
Minor mods to get it to fit properly on my 05 fxt. Would recommend to anyone for sure!
Verified Purchase
Worked wonderfully
esrichmond135257 2 years ago
Bolted on directly. Passenger side bolted on without any issue. Drivers side took a modification, but ended up bolting on just fine. Very pleased with the overall construction and hardware. Definitely recommend this to anyone wanting to upgrade their brakes.


  • AnswerQ: adapters  michaelkenechuk38183 25 days ago

    hey I'm about to purchase some 4 pots for my 03 wrx, the brakes i plan on purchasing actually come with rotors, my question is will the rotors line up or will i still need this adaptor. i apologize if this is a dumb question I'm knew to the brake modifying world and i don't want to have to drop an extra 200 if its not necessary. thank you for your time

    • A: You will want to use rotors that are specific to the calipers, and the fronts should not need an adapter. These adapters are only for bolting on the rear 2 pot calipers.

      Zach G. 25 days ago

  • AnswerQ: 16 inch wheels?  Compass Motorsports 5 months ago

    I have a 2000 Impreza RS will these fit with my stock 16 inch wheels or do I need bigger wheels?

    • A: We have not tested the stock RS 16 wheels and would not be able to confirm.

      Nick S. 5 months ago

  • AnswerQ: BRZ upgrade  K9 6 months ago

    Are these the adapters that will let the 2 pot callipers from the 06 wrx to fit the BRZ? Thanks

    • A: Unfortunately we have not been able to confirm fitment with the BRZ/FRS at this time.

      Nick S. 6 months ago

  • AnswerQ: 04 sti Brembo's   hemo032007228 10 months ago

    I have an 02 wrx and I have 04 sti rear Brembo's, will these fit on my car and allow me to use the brakes.

    • A: These are only meant to be used on the 06-07 WRX FHI Brake Calipers. They can however be modified to work with the rear Brembo kits.

      Zach G. 10 months ago

  • AnswerQ: E brake  bddilse81181 2 years ago

    Will the stock e brake still work

    • A: As long as you use rotors that have the same parking brake dimensions as stock, the parking brake will still be functional.

      Zach G. 2 years ago