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

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

ARP L19 headstus for the VQ35 are the best studs available without expensive machine work required for using even larger diameter studs.

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.

These bolt-on header upgrade for oyur Speed Force Racing Single turbo system for your

Altima are the last component in the exhaust system that must be addressed.We have seen as much as 15 horsepower at the wheels with these bad boys.Ask us about these in 321SS!

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.

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.

Stage 1 heads feature extensive port work on the intake and exhaust. We utilize stock valves and springs which are inspected and tested to meet factory specifications.

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

Speed Force Racing is proud to offer the Haltech Platinum series Plug and Play EMS for the 2003-06 Nissan Altima or Maxima. This is the EMS system that you want to tune your Nissan with.With the ability to accept dual wide-bands and exceptional control of the engine, you cant go wrong. 

Speed Force Racing can take your stock automatic transmission that is barely capable of withstanding 300WHP and turn into an incredible transmission that can withstand 450WHP!

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

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.

Speed Force Racing is now offering a single turbo system for the 2002-2009 Nissan Altima Sedan with the 2.5L QR25 engine.This system bumps up the power level upto 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!!!!

In order to run safely past 400-450WHP, an upgraded bottom-end with forged internals is a must.You get your choice of compression ratios ranging from 8.6,9.2,10.5 or 11.5 to 1 depending on whether or not you are going forced induction or keeping it all motor.

Speed Force Racing is now offering a single turbo system for the 2002-2009 Nissan Altima Sedan 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.

Speed Force Racing can take your stock VQ35 Altima and turn it into a tire smoking, turbocharged and intercooled,300WHP sports sedan, that can not only keep up but even beat, many of the sports cars on the road today

Speed Force Racing is now offering a single turbo system for the 2008-2010 Nissan Altima Coupe with the CVT(Continuously Variable Transmission) or six speed transmission.This system bumps up the power level to 320WHP(CVT) or 400WHP(Six speed)! This is about 400-480 horsepower as measured at the flywheel.

If 300 WHP is not enough for you then step up to the SFR stage 2 single turbo system for the Nissan Altima.This system bumps up the power level to 374WHP! This is about 450horsepower as measured at the flywheel.

These engines are capable of withstanding 1000+WHP.Now you can buy a professionally assembled, balanced and bluprinted, Darton MID sleeved short block with Arias pistons and Pauter rods that is capable of handling in excess of 1000WHP!