Heck if I know
So I was on ebay and found an almost brand new "Jake E Brake" built for the cummins 8.3 i believe checked the specs and its a 4" jake perfect for my 06 with 4" already on it. Well I got the JB for $400 but then I thought I would check and see if anyone has installed aftermarket JB's and someone said you have to replace the exhaust springs. Is that true also is there any tips that I should know about before/during installation. Any and all information is appreciated.