Ford Focus ST / RS 2013-2018 JMF Billet Port Injection Intake Manifold

The long awaited Focus ST JMF intake manifold is HERE! We have these available for pre-order with an anticipated ship date of 07/01/2025. We will only have 10 Port Injection units available for pre-order. Once sold out, next batch ETA of September 15, 2025.

With over a decade of proven results, JMFabrications has finally released the long anticipated billet intake manifold for the Focus ST. With an emphasis on function and performance in mind, this intake manifold is made out of full 6061-T6 billet. Radiused inlets are also CNC machined into each plenum bottom to improve airflow by 10-15%. All components are sealed with high quality silicone orings and stainless steel hardware. This manifold was designed to not only look awesome but to perform even better.

Extensive testing was done on various setups and improvements were made in every aspect. Even on a stock turbo car with no additional tuning and simple bolt ons the intake manifold produced an additional 8hp/11ft-lbs and drivability was improved greatly. Adding this manifold to a more serious setup yielded gains of 45hp with no additional tuning. With a proper tune and setup 60hp gains can be expected!

Every effort was made to keep this manifold as close to a stock replacement as possible. Installation for the most part is bolt on but some modifications may be required. Professional installation is highly recommended!

Features:

• CNC machined from 6061-T6 aircraft quality aluminum
• CAD designed & tested
• Modular bolt together design for cost effective upgrades
• O-ring'd head flange eliminates the need for a gasket
• Several different finished and throttle body flange options available
• 5 port vacuum plate
• Limited Lifetime Warranty
• Made in the USA

What's Included:

• Billet intake manifold
• 10AN billet fuel rail (ORB adapters availble to reduce size)
• Billet fuel rail mounts and spacers
• New mounting hardware
• Silicone Orings
• Vacuum fittings
• 3' of brake hose
• 12" throttle body extension wire harness
• Fuel pressue sensor relocation kit

Install Tips:

• The throttle body should be installed with the electronic housing facing the same direction as factory.
• Use blue loctite on all fuel rail mounting hardware. Avoid mounting FP regulator directly to rail end.
• Allow sufficient slack in your fuel lines to prevent stress on the fuel rail mounts.
• Fuel rail designed for a 14mm Bosch style injector with a 48mm oring to oring height.
  
• Remove the dipstick tube from the block and reinstall last. Use grease in the grommet and install from underneath.
• The center bolt for the head flange can be a bit tricky to access. The best tool to use is a hex bit and ratchet wrench.
• Installing the vacuum lines on the manifold first before placing in engine bay is helpful.
• Be sure to use blue loctite on the intake manifold head bolts and torque them to 13-16 ft/lbs.
• Be sure to use a teflon paste sealant on the fuel pressure sensor relocation fittings, teflon tape is not recommended.
  

Fitment:

• 2013-2018 Ford Focus ST
• 2016-2018 Focus ST