VIPER171 Cold Air Intake for '99-'05 E46 328, 325, 323 (all variants) (All UUC Products) -- UUC Motorwerks Shopping Cart -- variants) (all 323 325, 328, E46 '99-'05 for Intake Air Cold VIPER171

<A HREF="http://www.uucmotorwerks.com" TITLE="UUC Motorwerks"><IMG SRC="https://store.nexternal.com/uuc/avatar553_29.gif" ALT="UUC Motorwerks" NAME="UUC Motorwerks" BORDER=0></A> <H1>VIPER171 Cold Air Intake for '99-'05 E46 328, 325, 323 (all variants) -- UUC Motorwerks Shopping Cart</H1> <STRIKE>$425.00</STRIKE> $120.00 -- VIPER171 Cold Air Intake for '99-'05 E46 328, 325, 323 (all variants) <IMG SRC="https://store.nexternal.com/uuc/images/VFC.jpg" WIDTH=250 ALIGN=right ALT="VIPER171 Cold Air Intake for '99-'05 E46 328, 325, 323 (all variants)" NAME="VIPER171 Cold Air Intake for '99-'05 E46 328, 325, 323 (all variants)" BORDER=0 HSPACE=10> VIPER Ultimate Cold Air Intake co-developed with Europe's largest performance air filter manufacturer, PiperCross (UK). The Viper features an enclosed foam air filter ducted directly to the brake duct for maximum efficiency and high-speed ram effect. Ducting tube features integral pressure relief to eliminate the possibility of water intake and to provide a secondary cold air inlet behind the headlight. Two versions available: 1) Carbon Fiber (CF) airbox. 2) Silver powdercoated airbox. Note: Both versions have exact same performance, difference is only cosmetic. Design is similar to the E46 M3 which has the majority of the intake path coming from the driver's side brake duct: <img src="http://www.uucmotorwerks.com/images/E46M3OEINTAKE.jpg"> If BMW were tweaking the standard E46s for better intake efficiency, this is what they would do. The tube itself is a high-pressure polypropylene that can withstand the vacuum of forced induction (turbo/supercharger) applications. The inner texture itself serves to break up the laminar flow effects that typically make other tubes "act" smaller due to this stagnant layer that "clings" to the walls (the boundary layer effect). Overall diameter of our nominal 3" or 4" tube (depending on application) is actually and effectively larger, increasing efficiency. This intake design, filter, and tube technology was originally seen in the Lotus 340R: <img src="http://www.uucmotorwerks.com/images/LOTUS340R1.jpg"> Filtration is accomplished via the most sophisticated media available today, a specially developed polyurethane foam which has both higher performance and life expectancy than paper. This reticulated foam is created by a chemical reaction, it is then placed in a gas filled combustion chamber where a controlled explosion burns away any complete cell walls in the material to form a skeletal cellular structure which is strictly quality controlled. This process ensures that the foam consists of tiny open cells which trap contaminants. The cell size of the foam, its porosity, is measured in Pores Per Inch (PPI). These air filters use up to six layers of foam with varying porosity descending in pore size in the direction of air flow. Cleaning is very simple, a simple rinse in water and a light re-oiling is all that is necessary. This filter material is designed for street use, but is suitable for racing use. <LI>type: Carbon fiber airbox VFC171; Silver airbox VM171 <A HREF="http://www.nexternal.com/uuc" TITLE="UUC Motorwerks Products">UUC Motorwerks Products</A> <A HREF="http://www.uucmotorwerks.com">UUC Motorwerks</A> UUC Motorwerks Online Store powered by Nexternal <A HREF="http://www.nexternal.com" TITLE="shopping cart software">shopping cart software</A>