Injen Short Ram Intake (Polished) – BMW 335i / 435i / M235i (N55)

OVERVIEW

The SP series is Injen Technology's flagship traditional aluminum intake line. Injen produced the world's first tuned air intake system and holds four patents covering the intake tuning process, including MegaRam (MR) Technology (patents 7,359,795 and 7,669,571) and Air Fusion (patent 7,721,669). The SP1128 applies that development work to the N55 3.0L turbo six.

The system replaces the restrictive factory airbox with a 6061-T6 aluminum intake tube that gives the turbo a smooth, uninterrupted path to the compressor inlet. A custom heat shield with a matching cover is built specifically for this chassis, keeping the filter isolated from radiant underhood heat. Injen developed the intake on the dyno for gains of up to 13 horsepower and 11 lb-ft of torque while holding a safe air/fuel ratio across the power band, so no additional tuning is required.

Air is drawn through a fully serviceable Injen SuperNano-Web dry filter, which adds filtration surface area for greater airflow without an oiled media. The polished aluminum tube is a clean showpiece under the hood, and the system delivers an aggressive, throaty tone under full throttle. Made in Pomona, California and backed by the Injen Technology Limited Lifetime Warranty.

SPECS

• Series: Injen SP short ram air intake system
• Dyno-proven gains of up to 13 hp and 11 lb-ft of torque
• Intake tube: 6061-T6 aluminum, polished finish
• Also offered by Injen in wrinkle black finish
• Filter: Injen SuperNano-Web dry air filter, 3.50" inlet, fully serviceable
• Replacement air filter part number X-1021-BB
• Optional Hydro-Shield pre-filter part number 1037BLK or 1037RED
• Includes an application-specific custom heat shield with cover
• Maintains factory air/fuel ratios; no additional tuning required
• Not CARB exempt — not legal for sale or use on pollution-controlled vehicles in California
• Made in Pomona, California, USA
• Injen Technology Limited Lifetime Warranty

PARTS INCLUDED

• 1 x Intake tube
• 1 x 3.50" SuperNano-Web nanofiber dry filter
• 1 x Heat shield
• 1 x M6 Vibra-mount
• 3 x M6 nuts
• 3 x Fender washers
• 1 x M6 x 16 mm hex cap screw
• 2 x M4 button head screws
• 1 x M6 stand-off stud
• 1 x Rubber trim, 13.5" length
• 1 x Rubber bulb trim, 8.5" length
• 1 x Rubber bulb trim, 19" length
• 1 x Vinyl cap (manual transmission only)
• 1 x 10-page instruction sheet

TECH RESOURCES

Additional Parts Required

• None. Injen specifies no additional hardware, tuning or fluids for this intake — all required mounting hardware is supplied in the kit.
• Installer-supplied tools: metric socket and wrench set, flat and Phillips screwdrivers, a trim panel tool and a torque wrench.
• Optional service items: Injen replacement dry air filter X-1021-BB, Injen Hydro-Shield pre-filter 1037BLK or 1037RED, and an Injen dry-filter cleaning kit.

Installation

• Injen SP1128 Installation Instructions (PDF)

Notes

• Note: This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles.
• sl-note: This intake does NOT fit the 2013 M135i on the E82 chassis. Injen's official application list also includes the 2016–2018 F87 M2, which is not reflected in the product title — confirm your chassis code before ordering.

PART NUMBER

• SP1128P — polished finish (this listing)
• SP1128WB — wrinkle black finish

VEHICLE APPLICATIONS