aFe Cold Air Intake for 2003-06 BMW Z4

• Increases horsepower up to 25 HP depending on applicatio
• Improves torque up to 35 lbs/ft depending on application
• Maximizes airflow for better acceleration and responsiveness
• Improved performance results in greater fuel efficiency
• Installs in less than 45 minutes using factory mounting points
• No cutting or drilling to engine compartment is required
• Replaces OE air filter with high flow, high performance 360 degree radial flow air filter
• Washable/reusable air filter with the deepest pleats in the industry is the largest possible in the space allowed
• Replaces factory air box with a heat-blocking shield that seals to the hood
• Retains factory intake tube
• Limited lifetime warranty

2005 BMW Z4 Review

The BMW Z4 roadster reminds us why we buy these types of cars. With sexy lines, a stiff chassis and  large brakes, the Z4 provides a great driving pleasure. With the well-respected 3.0L inline 6 cylinder engine under the hood, the Z4 is no snail. aFe

54-10651 BMW Z4

has always expressed an interest in BMWs  and knew that the Z4 was in need of  a Magnum FORCE upgrade. Project leader, Eric Bajza, tore out the restrictive OE intake system and went to drawing board. What Eric and the aFe engineering staff came up with was a sweet looking intake system and an engine note so hypnotic that

2005 BMW Z4 3.0

will keep you on the redline. Here is how aFe did it.

 

Our test car was a 2005 BMW Z4 3.0L-6cyl borrowed from a local BMW Car Club of America member. The aFe intake system (PN 54-10651 for the 2.5L and 54-10671 for the 3.0L) consists of a powder-coated heat shield, a high flow conical air filter, a billet aluminum air filter adapter, a brushed aluminum lid and a complete installation hardware  kit. Installation time is less than 30 minutes and installs with basic hand tools. In less than half an hour, you will gain 11 hp and 14 ft-lbs of torque. Here is how aFe did it.

 

Stock 3.0L 6cyl

Safety first. Before we start the installation, we made sure the engine had properly cooled down and the negative terminal on the battery was disconnected in order to prevent any injuries or mishaps. Our technician, Adrian,  disconnected the MAF sensor. The air box comes out with the removal of two 10 mm screws. The MAF sensor is carefully separated from the air box and the air box is removed from the engine. The aFe housing and air filter adapter are fastened together with classy looking button head screws. The housing assembly is lower into place and secured with the factory screws. Take a look at the huge billet MAF adapter and you will say "WOW". This piece is so beefy it just screams power. The secret lies in the 3

54-10651 Installed

angle adapter. The huge high flow conical air filter is installed onto the adapter and  clamped down. Finally the beautiful brushed aluminum heat shield is fasten to the unit. With the installation now complete, we were off to the Dyno!

 

We strapped the Z4 to the Mustang Dyno and the Z4 screamed with a fierce growl. We smashed the throttle and the rear tires break loose! Once the rollers stopped, we

54-10651 Dyno Scan

registered a 11 hp gain and a tire splitting 14 ft-lbs of torque! The power band was smooth all the way to the redline. The simplicity of this kit coupled together with the huge power gain makes this kit a worthwhile investment for your Z4.