the flapper mod does not affect the exhaust in anyway apart from the noise.
it is a stock feature, but my modding it, you have it enabled all the time.
simplest way is to just pull out the black hose from the vacuum tub.
I am thinking of getting the flapper mod and I have looked all through this forum but can not find anything on whether or not it reduces back pressure in any significant way. I'm just concerned that this may have a negative effect on torque.
Also there seems to be a lot of differing opinions on how to do it and they all seem a litle difficult to understand. Anyone in Adelaide had it done?
the flapper mod does not affect the exhaust in anyway apart from the noise.
it is a stock feature, but my modding it, you have it enabled all the time.
simplest way is to just pull out the black hose from the vacuum tub.
84 MK1 GTI
01 DC2R
website: www.my-gti.com
84 MK1 GTI
01 DC2R
It's safe, just do it. Find a screw big enough to plug the hose if you want.
And use a plier if you can pull the hose out by hand..
It would by a miniscule amount up to when it opens but as its at the end of the exh the gasses would of cooled and reduced in volume so it only affects the noise bypass.
I cut the hose under left rear valance and plugged it with a blocked fish tank air hose joiner.
Bazzle
Prev 2008 R32 3 door DSG.
Prev 2010 S3 Sportback Stronic.
Now Lexus IS350 F Sport
I haven't heard anything about affecting torque, but it seems to drone slightly in 6th gear on the highway if you're in too low a gear (although it's not really a drone just gets a bit deep). give it a go and see what you think it's 100% reversible if you dont cut the hose, but you have to seal off the hose (i just doubled it over and used a zip tie).
Well I got under the car, cut the hose and plugged it with a golf tee. (fits perfectly). It's really only a subtle difference. (My last car had full custom exhaust so still quiet in comparison.) I do like it better tho. Particularly when you are in manual mode, I can rely more on the engine sound to change up and down. This will have to do as far as exhaust goes. I really cant see myself going down that track again (custom exhaust). I don't think it would suit the dsg. loud exhausts sound better with a manual imo.
Get my haldex gen 2 installed tomorrow. Cant wait!
Volvo S60 RD T6
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