Stage 4 heads are the best flowing cylinder heads you can buy for your Altima or Maxima. They feature 1mm oversize stainless Ferrea valves with the Ferrea race spring and titanium retainer package.

The cylinders heads are responsible for getting air into your cylinders. To make big power you needs lots of airflow without compromising velocity.Our cylinder heads will outflow the stock heads by as much as 40% while maintaining enough velocity at both high and low rpms to provide substantial torque and power increases

The cylinders heads are responsible for getting air into your cylinders. To make big power you needs lots of airflow without compromising velocity.

Stage 4 heads feature extensive port work on the intake and exhaust and +1mm Ferrea valve, spring and titanium retainer package.

Stage 3 heads feature extensive port work on the intake and exhaust and +1mm Brian Crower valve, spring and titanium retainer package.

Stage 3 heads are the best flowing cylinder heads you can buy for your Z or G. They feature stainless BC valves with the BC race spring and titanium retainer package.

Stage 2 heads feature extensive port work on the intake and exhaust and a JWT spring and retainer package.

Speed Force Racing can take your stock VQ35 Maxima and turn it into a tire smoking, turbocharged and intercooled, 315WHP sports sedan. Your car can not only keep up but even beat, many of the sports cars on the road today.

Stage 1 heads feature extensive port work on the intake and exhaust.

The cylinders heads are responsible for getting air into your cylinders. To make big power you needs lots of airflow without compromising velocity.Our cylinder heads will outflow the stock heads by as much as 40% while maintaining enough velocity at both high and low rpms to provide substantial torque and power increases.

This is our single turbo system for the Infiniti G35.We wanted the ability to make horsepower so we decided to use a full sized T4 turbo. A Precision T67 turbo with a T4 exhaust housing was chosen to handle the duties of compressing the air.

This is our single turbo system for the Infiniti G35.We wanted the ability to make horsepower so we decided to use a full sized T4 turbo. A Precision T67 turbo with a T4 exhaust housing was chosen to handle the duties of compressing the air.

This is the tuner version of our twin-turbo system for the G35.It comes with everything you need to bolt on this turbo system.It does not come with engine management,injectors or fuel system upgrades.

Now you can have a dyno proven 476 horsepower at the wheels out of your 350Z/G35 on a completely stock motor! Imagine 571 horsepower at the crank?

Speed Force Racing is now offering a single turbo system for the 2002-2006 Nissan Sentra Spec-V with the 2.5L QR25 engine.This system bumps up the power level to 295WHP! This is about 345 horsepower as measured at the flywheel.

This is a "Tuner" system and does not come with injectors or engine management system!!!

Speed Force Racing is now offering a single turbo system for the 2002-2006 Nissan Sentra Spec-V with the 2.5L QR25 engine.This system bumps up the power level to 295WHP! This is about 345 horsepower as measured at the flywheel.

This intake manifold eliminates the secondary butterfly system of the stock manifold. By doing this we eliminates the dip in horsepower in the midrange and provide big horsepower gains all the way to redline.Thi si the perfect itnake manifold for direct port nitrous and forced inductions systems.

This is the SFR aluminum engine cover to use with the SFR High Velocity Intake Manifold.

Every SFR intake manifold comes with provisions for the stock components. We can weld bungs and fittings for direct vacuum connections,MAT sensors,etc...... for FI vehicles.