Japspeed 4-2-1 Decat Sound... Not sure if its right? Video

[Ash4Lotte]

Alright guys, i know a lot of you will have headers, but i have never had a 4-2-1 manifold before, and certainly never had a decat before, and im not sure if this is normal..


i have a japspeed 4-2-1 manifold, unsilenced bpipe and magnex oval, and did the swap a week ago, did not use a new gasket at the back of the engine as the old one seemed perfectly fine. There never was a gasket at the midpipe => header connection, so did not use anything. i have an mot next week and will have to revert back to the oem one so i did not use any sealent or gum gum there either.


My question is.. when putting my foot down, there is a faint whistle/trebble-y sound. ive read that headers can produce these sounds, but was just making sure i have no leaks in the system and is normal. There is a video below and is most notable towards the end of the movie. Also, turn your speakers up


[video=youtube;uyTZa4o499c]http://www.youtube.com/watch?v=uyTZa4o499c&feature=plcp[/video]


any input at all would be greatly appreciated

 

[Justinian]

I think may be the gasket blowing...e.g whistle

 

[Winker234]

i have the same manifold and im experiencing the same sound and thinking the same thing! but ive had the car up off the ground and looked under it and i have no leaks! but im still going to remove the exhaust at the flange and put some paste on the gasket.

 

[Ash4Lotte]

mines off at the moment as i had my mot last week, when i put it back on, i think i will cake some paste on it as well, not sure if its designed to have that sound or not :S

 

[KingCal91]

try contacting Japspeed? email them and link the video, sure they'll provide an answer and a solution