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The B4 represents the culmination of Bassani's research and development for the better part of forty years. This exhaust was designed strictly to make big, big power. How? Equal length headers. Stepped head pipes. A hidden inner collector. These are features you are simply not going to find on another exhaust.
We at RevZilla had the good fortune to speak directly with Daryl Bassani about his intentions and target user for the B4 system. Daryl designed this exhaust to offer the most to owners of bikes making under 120 horsepower. Typically, bikes without a bump in compression, camshaft(s), or significant head-work (or some combination of the three) are going to make power under that threshold. By taking an honest assessment of your bike's power, or the results of your last dyno run, you may find that selecting a B4 exhaust will make a marked difference in your bike's performance as opposed to selecting 'too much pipe' for your bike.
The B4 system does not utilize as many diameter steps as the B1 system, and as such, promotes better exhaust velocity on most street engines. Daryl also spent time going over the importance of the collector in this system. Effectively acting as a 'collector-within-a-collector', Bassani has drawn on their research to help each cylinder most efficiently help its mate through exhaust scavenging. Utilizing the same principles used in carb venturi development, Daryl and his team are able to manipulate the velocity of exhaust gases to tweak every last shred of oomph from your motorcycle.
The B4 system is right for a lot of mild tuners - as Daryl told us, "Try this exhaust B4 you try the B1." We concur - heck, you might want to try this B4 you try anything else!
Electra Glide CVO/SE FLHTCSE 2004
Electra Glide CVO/SE FLHTCSE2 2005
Electra Glide Ultra Limited CVO/SE FLHTKSE 2014
Road Glide CVO/SE FLTRSE3 2009
Road Glide CVO/SE FLTRSEI 2009
Road Glide CVO/SE FLTRSEI2 2001
Road Glide Ultra CVO/SE FLTRUSE 2011
Road King CVO/SE FLHRSE3 2007
Road King CVO/SE FLHRSE4 2008
Road King CVO/SE FLHRSE5 2013
Road King CVO/SE FLHRSEI 2002
Road King CVO/SE FLHRSEI2 2003
Street Glide CVO/SE FLHXSE 2010
Street Glide CVO/SE FLHXSE2 2011
Street Glide CVO/SE FLHXSE3 2012
Tour Glide Ultra Classic FLTCU/I 1995
Ultra Classic Electra Glide CVO/SE FLHTCUSE 2006
Ultra Classic Electra Glide CVO/SE FLHTCUSE2 2007
Ultra Classic Electra Glide CVO/SE FLHTCUSE3 2008
Ultra Classic Electra Glide CVO/SE FLHTCUSE4 2009
Ultra Classic Electra Glide CVO/SE FLHTCUSE5 2010
Ultra Classic Electra Glide CVO/SE FLHTCUSE6 2011
Ultra Classic Electra Glide CVO/SE FLHTCUSE7 2012
Ultra Classic Electra Glide CVO/SE FLHTCUSE8 2013
|Product Style||RevZilla Item #||Manufacturer Product #||Availability|
|Megaphone Muffler / Chrome||898365||FLH-747||Available: Requires 1-5 business days lead time prior to shipment|
|Megaphone Muffler / Black||898366||FLH-747B||Available: Requires 1-5 business days lead time prior to shipment|
|Straight-Bodied Muffler / Chrome||898367||FLH-757||Available: Requires 1-5 business days lead time prior to shipment|
|Straight-Bodied Muffler / Black||898368||FLH-757B||Available: Requires 1-5 business days lead time prior to shipment|
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