6 replies to this topic

[merther]

My car is fitted with a maniflow system, with a maniflow manifold with the larger middle pipe. The exhaust is a full system with a centre 'cherry bomb' and rear centre exit silencer.
I am looking at doing an event with a 98dcb limit. I have no idea on noise decibels does anyone know roughly what a maniflow system is rated at?
Thanks in advance.

[Anthony30]

My maniflow twin box side exit is very quiet. You need to measure it to be sure.

[Rocket.]

Probably best to buy something cheap like this just to make sure

 

http://www.ebay.co.u...=item35d939eaf3

[robminibcy]

if you have a smart phone there are apps that can be downloaded for measuring volume. I'm not sure how accurate they are but should give you a rough idea

[robminibcy]

although a maniflow twin box will be well within that limit. I've swapped to a single box because a twin was too quiet for me!

[KernowCooper]

I have a Maniflow system on mine the single box and its not that loud, the problem arises though when the sound deadning material get blown out and clogged with age, then they get louder

[Cooperman]

With a Maniflow twin-box centre exit my 'S' came in at 95 db @ 5000 rpm at 1 metre from the pipe end at 45 degrees (standard procedure). The RC40 twin box was slightly quieter at 93 db.