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Rubber hosing expands under boost pressure
Introducing our Sports Series 4" High Flow Catted Downpipes for your 2020-24 M135iX B48 four-cylinder turbo engine
Mandrel Bent 3" (80mm) piping
When the oil cooler box enclosures are used in conjunction with our optional ducting shroud kits
our charge pipe come with two 1/8" NPT threaded bung (for methanol or nos injectors) welded to our charge pipe
Competition Series 4" Catless Downpipe for the X1/X3/X4/Z4 N20 (4 Cylinder) Engine Finish:Polish Finish Rubber hosing expands under boostIntroducing our Competition Series 4" Downpipes for the 2011 15 X1 s xDrive28i 20i 16i, 2011 17 s xDrive28i 20i 18i, 2014 18 X4 xDrive28i 20i 18i and 2011 16 Z4 sDrive28i 20i 18i N20 (4 Cylinder) Engine. Key Features: Made in the USA! Manufactured in house. Now available for the 2011 15 X1 s xDrive28i 20i 16i, X3 s xDrive28i 20i 18i, X4 xDrive28i 20i 18i and 2011 16 Z4 sDrive28i 20i 18i N20 Engines! Horsepower gains of 14 to 16whp average (gains will
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