4 Step Performance Upgrades for late model Harley-Davidson® Motorcycles
STEP 3: 97" & 106" BIG BORE KIT The next step is to increase the displacement of your engine. The S&S® 97" Big Bore Top End Kit for 1999-’06 88" engines or the 106" Top End Big Bore Kit for 2007-up 96" engines are an easy and cost effective way to do it....