~ All our product prices include UK Delivery ~

~ Additional costs for international shipping - please contact us for a quote (sales@psdesigns.global) ~

~ If you wish to buy multiple items we may be able to offer you a discount - please contact us for details (sales@psdesigns.global) ~

PSDesigns S54 Velocity Stack Conversion 

Our Increasingly popular S54 Velocity Stack Conversion, the most complete conversion avaliable for the BMW S54 Engine, as found in several BMW M Cars including the E46 M3 and the Z4M.

The Kit includes all mechanical components to convert the engine to Velocity Stacks.
Kit Contents:

6 Intake trumpets (Velocity Stacks) painted in a colour of your choice (heat resistant paint and lacquer)

Carbon Fibre Heat shield

Billet Oil Catch tank

Oil Pipes and clamps

Polished AN Hose finishes

6 ITG Velocity Stack Air Filters

Idle Control air Filter

IAT (intake air temperature) Sensor and wiring harness

Silicone Intake Boots x6

Air Feed Pipe

Jubilee Clamps x12

Silicon Vacuum Line Blank

Billet Oil Return Feed Blank and pipe

Cable ties, fixings and connectors

Fitting Instructions and after sale support


At just £1124, including UK delivery this is the most cost effective Velocity Stack conversion on the market. There is also an option for UK customers to return their OEM intake plenum and recieve £100 back. For further info please drop us an email to info@psdesigns.global

The conversion REQUIRES an ALPHA-N MAP, similar to a CSL airbox, 
our recommended map is a TTFS Remote Tune - Also available through our website 

TTFS BMW E46 M3 Custom Alpha-N Remote

The Alpha N tune includes a complete custom remote tune with data logging. It is customized to your specific naturally aspirated S54 engine and is offered exclusively as our recommended tune for the PSDesigns S54 Velocity Stack Conversion



  • Custom Alpha-N Tune
  •  ProTuner, ProLogger, & cable



  • Throttle Remapping
  • MAF Sensor Delete
  • Custom vanos timing for specific application
  • Increase in Torque and Horsepower 
  • Sport Button remains on when car is turned off
  • SAP Delete option at no extra cost
  • Increase red-line
  • Shift light for 6 Speed cars
  • Launch control option for 6 speed cars
  • ProLogger software allows you to read codes and clear codes
  • ProLogger software allows you to reset engine adaptations
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