Spearco BMW 335i/135i Intercooler Features:
Performance:
- 14.38 horsepower average increase over stock at higher boost levels
- Averaged 14.3 pressure in and 14.1 pressure out - Only 0.2 pressure drop
- Temperature drops average over 125° F and 10% better than stock

Details:
- Fits both 335i and 135i models
- Drop in upgrade for both manual & automatic transmissions
- Bolt-on intercooler kit…no modifications required
- Bar and plate core design - designed for rugged conditions and high boost levels
- Computer modeled core design - high effectiveness and low pressure drop
- Works with all ECU upgrade programs
- Strong aluminum end tanks and piping replaces the weak factory plastic
- Installs in under three hours

BMW owners can now enjoy the benefits of increased flow and more efficient air to help dramatically lower intake air temperatures to increase power. By using a massive 6" thick W.A.V.E. Technology core, the Spearco front mount intercooler dropped charge air temperatures on average of 125 degrees on the twin turbo vehicle. In addition to lower intake air temperatures, the pressure of air exiting the intercooler compared to the pressure entering the unit was only an amazing 0.20 psi drop. The stock unit has over one pound of pressure loss/drop due to the factory unit's lack of efficiency and limited size. When the stock unit is upgraded to the Spearco you will have less heat and more power due to the ability to quickly and efficiently move the pressurized air through the intercooler assembly.

Once the initial investment is made, the result is a lifetime of free power and improved fuel economy. The intercooler reduces charge air temperature entering the engine, increasing the air density for increased power and torque, while reducing the overall thermal load on the engine and cooling system as exhaust temperatures are reduced at the same time. This results in less transfer of heat to the cooling system, and engine compartment and assists in maintaining normal temperatures on long hard power pulls. Since the intercooler is mounted in the factory location there is no need to worry about making any modifications to the vehicle. In addition to power and performance, you can anticipate an increase in fuel economy as the cooler, denser air creates a leaner air-to-fuel ratio.

Spearco's drop-in replacement intercooler upgrade features W.A.V.E. Technology bar and plate cores for increased strength and efficiency by utilizing the maximum surface area of the cores available each core is pressure tested to over 200+ psi. Hand crafted and precision welded, each Spearco assembly is fabricated to strict tolerances and every unit is pressure tested underwater to ensure a leak free intercooler assembly. The Spearco Intercooler upgrade drops in place very easily in 2-3 hours time. Combined with higher boost pressures, the Spearco 335i/135i front mount intercooler provides a win-win combination of additional power and increased efficiency.

Turbonetics new Blow-Off Valve Kit increases your anti-surge protection. This will help protect the turbo as well as increase throttle response. Not only does this product give you better performance, it also adds more reliability over the factory units. Whether you are running the stock small turbochargers or upgraded turbochargers this will help alleviate some of the wear and tear on the turbochargers when pushing them to their limits. This will add the lifespan of the turbochargers.

• Twin Raptor Blow-Off Valves easily handling 600+HP for maximum flow and efficiency
• High flow BOV filters to prevent particulate entry and noise suppression
• Polished aluminum BOV's for high strength & clean looks
• Filters are removable for increased sound appeal
• Polished aluminum horns available separately
• Precision machined adaptor flanges to mount to factory positions
• All hardware, and accessories necessary for installation

Why are blow-off valves important? The turbocharger is moving large amounts of air while under boost, and this pressure is being delivered to the engine while the throttle is depressed. As soon as the throttle is lifted the butterfly closes in the throttle body preventing the pressurized air from entering the intake manifold. Because the engine is still moving exhaust gases and the inertia of the turbocharger is turning the turbine and compressor wheels, the air literally stacks up against the throttle blades. Pressure builds up within the system's piping extremely quickly and once it reaches the compressor wheel the air actually flows back out of the compressor inlet and limits the compressor from rotating. Because of the air reversing direction the pressure drops allowing the wheel to spin and once again raise the pressure. This process of up and down pressure and air reversal is surge and the result is the fluttering/barking sound that comes from the turbo. Surge is very detrimental to the turbocharger, resulting in various stresses being placed on the unit. The compressor wheel has high loads placed on it as it tries to move against this wall of air, and as high pressure air finds its way behind the compressor wheel. Compressor surge can result in the compressor wheel spinning on the shaft, shaft breakage, bearings to have unnecessary wear and potentially create contact between the wheels and housings.

The compressor blow-off valve is placed after the intercooler and before the throttle body to help eliminate the pressurized air. Vacuum controlled, the BOV receives a signal from inside the intake manifold or just after the throttle body, pulling up on a diaphragm, causing a valve to open inside the unit. The pressurized air that is discharged is then routed back to the inlet of the turbocharger or vented to atmosphere protecting the compressor from surge and assisting in maintaining the speed at which the turbochargers wheels are turning improving throttle response and drivability.