aFe Cold Side Charge Pipe 46-20237-B – BMW 335i / 435i / M235i (F30 / F32 / F22)

OVERVIEW

The aFe POWER BladeRunner cold-side charge pipe replaces the restrictive factory cold-side intercooler tube on N55-powered F-chassis BMWs fitted with the manual transmission. aFe reports maximum gains of +13 horsepower and +13 lbs. x ft. of torque, with the pipe outflowing the factory intercooler tube by 18%.

The tube is constructed of 2-1/2" to 3" mandrel-bent aluminum and powder-coated wrinkle-black for heat and corrosion resistance. Smooth-transition mandrel bends reduce turbulence, which increases horsepower and torque while lowering exhaust gas temperatures, and the high-temp wrinkle-black coating insulates the tube from engine heat. Two 1/8" NPT ports are provided for pressure sensors or water-methanol injection.

OE-style throttle body and intercooler quick connects are machined from 6061-T6 billet aluminum so the pipe retains factory connection points, and a heavy-duty 5-ply polyester reinforced silicone hump coupling with premium stainless steel clamps delivers a leak-free seal. The kit works with the OE intercooler and includes all necessary hardware. A laser-cut aluminum aFe POWER logo plate is welded on for an aggressive look.

SPECS

• Maximum gains: +13 HP and +13 lbs. x ft. of torque
• Outflows the factory intercooler tube by 18%
• Transmission: manual transmission applications only
• Tubing: 2-1/2" to 3" mandrel-bent aluminum
• Finish: high-temp wrinkle-black powder coat for heat and corrosion resistance
• End connections: OE-style throttle body and intercooler quick connects machined from 6061-T6 billet aluminum
• Ports: two 1/8" NPT ports for pressure sensors or water-methanol injection
• Coupling: 5-ply polyester reinforced silicone hump coupling
• Clamps: premium stainless steel
• Compatible with the OE intercooler
• Welded-on laser-cut aluminum aFe POWER logo plate
• Emissions: not CARB exempt; not legal for sale or use in California

PARTS INCLUDED

• Intercooler tubes (x2)
• Silicone hump coupling (x1)
• Stainless steel clamps (x2)
• O-rings (x2)
• Screws (x2)
• Port plugs (x2)

TECH RESOURCES

Additional Parts Required

• None. aFe Power specifies no additional hardware for this part — the coupling, clamps, o-rings and mounting screws are all supplied and the OE intercooler is retained.
• Installer supplies: standard metric hand tools, Torx drivers, and a jack and jack stands or a lift for front underbody access.

Installation

• aFe Power 46-20237-B / 46-20239-B BladeRunner intercooler tube installation instructions (PDF)

Notes

• Note: This system is not CARB exempt at this time and is not legal for sale in California or for use on vehicles registered with the California Department of Motor Vehicles.
• This is the manual-transmission version. The vehicle applications table below covers the F30 335i and 335i xDrive and the F22/F23 M235i and M235i xDrive. If you are shopping for a 435i, contact Speed Logic to confirm the correct part number for your car's transmission before ordering — the automatic-transmission equivalent is aFe Cold Side Charge Pipe (Automatic) 46-20239-B.

PART NUMBER

• 46-20237-B — manual transmission
• 46-20239-B — the equivalent aFe cold-side tube for automatic transmission cars, available as aFe Cold Side Charge Pipe (Automatic) 46-20239-B

VEHICLE APPLICATIONS