stock volume of a 400ex(?)

[my03-400ex]

hey, i was jw if anyone knows how many decibels a stock 400ex is? i was thinking about a pipe, and wondering just how much of a difference it is. thanks

[ryanh250ex]

stock is about 89 dbs.

most pipes are about a 7-10 db increase. depends on pipe, header, quiet core, spark arrestor, etc.

[2001400ex]

88-89db.

[my03-400ex]

how about alba's slip on(by the way, are these any good??) with the sound supressor(92db) and without (96)... is the increase between this and stock very noticable?