exhaust upgrade problems

[meunro00]

Hi guys.

im new to this forum and wish to seek some advice or even better a fix to my issue i have come across with my 2011 st d40 Manual thai build.

yesterday i upgraded my exhaust system and ive noticed ive loss some boost.double checked everything and all seams to be in good order.if anyone could suggest any ideas as to why this has happen would be much appriated!my d40 consist of the following mods prior to exhaust upgrade.

-chipit chip on low setting
-k &n panel filter
-snorkel
-egr blank
-hard hot pipe
-oil catch can


Type of exhaust i installed was a 3 inch highflow cat and no muffler.

ive tried to do some research online and things ive checked are listed below.
-all vacum lines are good
-maf sensor seams clean
-no leaking joins in exhaust
-got vacum on turbo
-turbo acutator thing seams to work
-disconnect chip
-

i get no turbo whistle as ive been told i should here with it breathing easier.i still get boost,but not that kick i use to get before exhaust upgrade.no codes have shown and i have never had any problems prior to this.

Cheers guys.
rob

 

[subz123]

Hmmm thats very wired you shoud get more spol noies from your turbo and less bottom end lag one of the boys willl amswer your question soon .

 

[subz123]

And welcome to the fourm

 

[subz123]

I could be wrong but maybe ur high flow cat ( even if its a high flow ) could be restricting power and noise my mates has an 2011 amd ran a straight pipe with a rezy at the end for noise car drives awesome