877-447-6297
Availability: In Stock
In Stock
Price: $1,599.99

Just send me the master kitIn Stock4$1,599.99
I want the stackout optionBack Order0$2,199.99
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The PRECISION RACEWORKS HI-PERFORMANCE ZF6HP21 MASTER KIT designed by our sister company Propulsive Dynamics combines all the necessary components for a complete performance transmission build into one complete package. 

This kit has been tested and proven on cars around the globe from 600whp up to 957whp!  We rate the kit at 800wtq because people expect a rating but the truth is we have never found the limit! These clutches will never be the cause of shift problems or problems holding power other components in the drive line will become the limiting factor.

That is why our kit is the #1 choice of everyone from weekend warrior to the most competitive racer.


What comes in the Master Kit?

- Performance Clutches 

- Performance Bushings 

- Overhaul Seal Kit

    - Sonnax Zip Kit

- Valve Body Plate

    - Transmission Filter

Additional Parts Required

- Purchase and use of XHP stage 3

- Pentison ATF 1 Transmission Fluid

Optional Parts

- New or Re-manufactured Torque Converter

- Valve Solenoids

Stack out option:
This option is for the customer that really want's to DIY the transmission but doesn't have any of the specialty tools or doesn't really feel up to the task at hand.  This option includes everything listed above except we handle most of the assembly for you.  For this option you simply remove the bolts holding the oil pump and remove the stack from the transmission (it slides out) we then assemble the guts you ship us and send them back your way.  This option takes us about 48-72 hours from the time we receive your components until they are headed back your way.

Actual Product Weight: 27lbs

Fits these transmissions: ZF6HP21

Package Contents:  All seals, O-rings, Gaskets, bushings, zip kit, valve body plate, clutches, pan/filter

BMW
1 Series
135i
2007-2010 (E8x N54)
BMW
3 Series
325
325i 2006-2013 (E9x)
BMW
3 Series
325
325xi 2006 (E9x)
BMW
3 Series
330
330i 2006 (E90/E91)
BMW
3 Series
330
330xi 2006 (E90/E91)
BMW
3 Series
335
335xi 2007-2010 (E92/E93) N54
BMW
5 Series
525
525i 2004-2006 (E6x)
BMW
5 Series
525
525xi 2006 (E6x)
BMW
5 Series
528
528i 2007-2010 (E6x)
BMW
5 Series
535
535i 2007-2010 (E6x)
BMW
X Series
X6
X635i 2009-2010 (E71)
BMW
5 Series
535
535xi 2007-2010 (E6x)
BMW
5 Series
530
530xi 2006-2007 (E6x)
BMW
5 Series
530
530i 2006-2007 (E6x)
BMW
5 Series
528
528ix 2007-2010 (E6x)
BMW
3 Series
335
335xi 2011 (E90/E91) N55
BMW
3 Series
335
335xi 2007-2010 (E90/E91) N54
BMW
3 Series
335
335i 2011 (E90/E91) N55
BMW
3 Series
335
335i 2007-2010 (E92/E93) N54
BMW
3 Series
335
335i 2007-2010 (E90/E91) N54
BMW
3 Series
335
335is 2011-2013 (E92/E93) N54
BMW
Z Series
Z4
Z435i 2009-2016 (E89)
BMW
Z Series
Z4
Z435is 2009-2016 (E89)
Overall Customer Rating of 1 Reviews:

Rating:

Bought the master kit + new solenoids, old transmission had rough upshifts and in-gear slip. Precisionraceworks built the complete transmission for me.
Have had it for about 2 months now, drove about 600 miles before pushing it.
My car makes about 800nm~ of torque and it shifts and holds every gear without any problems, can recommend this to 335i owners who wanna keep their AT.

Also wanna mention the great support from precisionraceworks, had about a month long e-mail conversation before i pulled the trigger on a built transmission, kept me updated during the build and answered all the questions i had. I live in Europe and they helped out with shipping aswell, shipped in a nice crate.
Only negative thing is price, specially if you are outside of the US due to customs fee's and shipping to Europe mostly.
Pros:
  • Good for high HP builds
Cons:
  • Price

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