CWC Billet LS Alternator Kit for Nissan RB20 RB25 RB26
CWC Billet LS Alternator Kit for Nissan RB20 RB25 RB26CWC Billet LS Alternator Kit for Nissan RB20 RB25 RB26


Looking for a replacement Nissan RB26DETT, RB25DETT, or RB20DET alternator without any luck?  Chances are they're either no where to be found or just simply too old/worn to be considered using.  Or are you looking at a higher amperage upgrade?

This CWC Billet LS Alternator Kit for the Nissan RB26, RB25, and RB20 engines allows you to forget you ever needed to find a replacement alternator from Nissan. This kit allows you to use a readily available GM alternator found on the various LSx (ie: LS1) equipped vehicles.

What does that mean for you?

  • Buy this kit
  • Remove your alternator from your RB
  • Walk into your local parts store and buy a GM alternator (2 wire version)
  • Install new GM alternator on your RB
  • Enjoy all the benefits of now having higher amperage without the extra hassle of a stock alternator

What is included: 

  • TOP Mounting bracket x1
  • 4PK Pulley x1
  • M10 bolt x2
  • M10 spring washers x2
  • M10 flat washers x2
  • M5 bolt x1
  • M5 spring washer x1
  • M5 flat washer x1

Removal Instructions:

  1. Disconnect
  2. Disconnect main power feed to alternator
  3. Remove earth wire from alternator (some cars do not have this)
  4. Disconnect sense light plug.
  5. Loosen alternator bottom bolt and top bolt. do not remove at this time.
  6. Loosen tensioner and remove belt from alternator pulley
  7. Remove top bolt from alternator (do not throw out you will need this)
  8. Remove bottom bolt from alternator and keep nut (new bolt supplied in kit)
  9. Remove alternator

Instructions New Alternator Prep:

  1. On your new ls1 alternator remove the original pulley
  2. Fit the new 4pk pulley to alternator
  3. The new pulley is a neat fit,if pulley does not slide on do not hit. warm pulley with heat gun or hair dryer.and slide on.
  4. If you car has small ring terminals m6 they will not fit alternator  battery post.
  5. Remove ring terminal and replace with m8 terminals

    Note: Some people drill out the original ring terminal to fit, the choice is yours.

Instructions Fitting New Alternator In Car:

  1. Place alternator in position with the sense plug facing away from the engine.
  2. Fit new long m10 bolt with one spring washer then one flat washer and install on lower mounting hole of alternator ,use factory nut to bolt in place. (Do not fully tighten at this point)
  3. Swing alternator toward block and fit belt.
  4. Now fit top mounting bracket with m10 hole to alternator and m8 hole to original adjuster. (see fig )
  5. Install new short m10 bolt with m10 spring washer and flat washer. and install from the rear of the upper alternator mounting bolt holes through too the new mounting bracket
  6. Reinstall original m8 bolt thought adjuster block and into new top mount bracket.
  7. Adjust belt tension and tighten bolts as per Nissan spec.
  8. Fit new m5 bolt with spring washer and flat washer.
  9. Using m5 bolt secure earth cable to back of alternator (see fig )
  10. Secure battery cable to alternator battery post with nut supplied.
  11. Plug sense/idiot light back in.
  12. 12 connect battery
  13. Double check all bolts are tight.
  14. Your done time to start it up.

LS1 Alternator on RB20 RB25 RB26


 LS1 Alternator on RB20 RB25 RB26


LS1 Alternator on RB20 RB25 RB26

Related Parts

Customer Reviews

Based on 30 reviews
Justin Looper
CWC is awesome

I got the CWC for my rb20 install took a couple hours but wow. The extra power the alternator gave made the car feel so much stronger and happier. I would recommend every RB series use this product, it will make life so much easier with extra power.

Cole Bender
LS alternator swap

Worked perfect bolted right in and works with factory belt thanks for the fast shipping and getting my RB s14 back in the road with a much more obtainable alternator !

Stylianos Stavrakis

CWC Billet LS Alternator Kit for Nissan RB20 RB25 RB26

Dennis McCarty
Great Kit

Solved my alternator problem with a very nice upgrade. Great kit with quality parts. The trick was figuring out which LS 1 alternator fits with the kit...I ended up going with a 2004 Pontiac GTO.

Hank Lagorce
CWC billet LS alternator kit.

Great quality part and easy installation. Shipping was fast. Definitely recommend!

About Raw Brokerage

Located in Orlando, Florida, Raw Brokerage was founded at the beginning of 2008. The company started out as an used Nissan RB engine parts website connecting enthusiast with hard to find parts in the United States. Since then Raw Brokerage has expanded into it's 4,500 square foot facility where it distributes thousands of new and used performance automotive parts, perform extensive car and engine builds specializing in the Nissan RB platform. We have accounts on over 300 brands and access to over 1,000,000 parts. Raw Brokerage focuses on it's core values of integrity, value and service. This allows our team to ensure top level customer satisfaction that you can rely on. Regardless of motorsport we are here to assist in getting your car to perform to it's highest potential. So shop with confidence with us when looking for your next body kit, engine block, turbo, or other performance parts.


What does that mean for you?

Our team is dedicated to more than just customer service, it's driven to provide customer success.  Just like you we are car enthusiast looking to enjoy the process of the build, the satisfaction of the improvements and the success at the track.

With over a decade operating in the performance automotive industry our team has been there, broke that part, compared the alternatives, and have been part of countless projects.

Just like our cars and yours, we're a company focused on always improving.  We seek to provide quality information, process your order quickly and accurately. 

This is the reason why countless car owners return each day to Raw Brokerage for their performance parts needs.





Warning: Cancer and Reproductive Harm

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