Sorry for reviving this up, but I have a post that might help people.
I recorded my car revving it up before any DIY mods. Link here:
Pre Drill and De-Snork DIY mod for Porsche 986 - YouTube
Today I went ahead and tried drilling my exhaust. Because I didn't have a long enough drill bit, I could only mar the surface and create a small hole. No biggie, I took a file and hammered it in, and was going to file a gigantic hole... But after an hour of filing, I only got the hole to be 1 cm -_- Bigger holes to come.
I went into the car, turned on the engine, started revving up... No noticeable sound difference.
I also did the de-snork mod afterwards since I wasn't happy with the sound increase (or lack there-of). Pulled the grill apart, ripped out the snork.
I went into the car, turned on the engine, started revving up again... No noticeable sound difference.
HOWEVER, I did record an after video, link here:
Post Drill and De-Snork DIY mod for Porsche 986 - YouTube
And if you compare the two videos, there's a VERY noticeable sound difference. The second one is also growler and throatier. You'll also notice the idle growl that wasn't there before.
Moral of the story: DIY Drill and De-Snork mods won't make a huge sound difference... but it does. Watch videos and judge.
Threaded Mode
