Graham1984 Posted March 28, 2012 Share Posted March 28, 2012 (edited) Has anyone who has a fully decat NA brought the 2.5 twin box from whifbitzs and if so what does it sound like. Due to the manifold I brought from Barney a while ago I get an annoying but somewhat brief rasp and where I have sod all silencing and a 2nd decat it raises the sound of it which is doing my head in. I was more interested as to what the catback exhaust sounds like and have been considering getting it but wouldn't mind hearing one first if possible. When my old manifold on my 206 gti was rattling my mate welded up the four pipes by the cat join which cured the problem and was interested if there is any similar cure that can be done. Frankly I am not expecting miracles and think the twin box should be quiet enough that when I open it up it does not attract the same level of attention as my current car state due to less noise and surely the rasp will seem less along with it. What do you lot think. Edited March 28, 2012 by Graham1984 (see edit history) Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted March 28, 2012 Author Share Posted March 28, 2012 ????? Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted March 29, 2012 Author Share Posted March 29, 2012 (edited) Has nobody brought this Even a video of a 2.5 single box on a full decat NA would be good just to get an idea. Edited March 29, 2012 by Graham1984 (see edit history) Quote Link to comment Share on other sites More sharing options...
Fitz Posted March 29, 2012 Share Posted March 29, 2012 I have the 2.5" single box but have both cats still in place. I can't think of anyone off the top of my head who has one that is fully decatted. Quote Link to comment Share on other sites More sharing options...
Guest suprasteven Posted March 29, 2012 Share Posted March 29, 2012 i am gonna fully de cat but only next month . . . SORRRRYYYY Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted March 29, 2012 Share Posted March 29, 2012 i think monkpower has a twin box from whifbitz, might be the 3" though, and iirc he has a obx manifold and is full decatted. His car is pretty loud but sounds the nuts, not particually raspy either Quote Link to comment Share on other sites More sharing options...
Monkpower Posted March 29, 2012 Share Posted March 29, 2012 Yes indeed Justin is almost correct - I have an OBX manifold, 2.5" 2nd decat and a 3" single box Whifbitz system. It does sound pretty loud with a little bit of rasp from the cheap and thin walled manifold. When Whifbitz sort out the NA manifold I will be putting one of them on. I think with a twin box 2.5" system you will have a fair bit of silencing but with a very nice tone. Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted March 29, 2012 Share Posted March 29, 2012 My name's not Justin dammit!!!!!!!!!!!!!!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted March 29, 2012 Author Share Posted March 29, 2012 Thanks chaps that is just the advice needed. I didn't want to get the twin box and think it is too quiet and vice versa ect. Quote Link to comment Share on other sites More sharing options...
Fitz Posted March 29, 2012 Share Posted March 29, 2012 My name's not Justin dammit!!!!!!!!!!!!!!!!!!!!!!! Yeah, its Biebs Quote Link to comment Share on other sites More sharing options...
Guest suprasteven Posted March 30, 2012 Share Posted March 30, 2012 Yeah, its Biebs Quote Link to comment Share on other sites More sharing options...
forester200 Posted March 30, 2012 Share Posted March 30, 2012 If it helps at all I have the Whifbitz full decat 3'' twin box on my vvti tt and it's a lovely system.....very quite on the motorway with no annoying droning at all, but sounds great when the foot is planted ! Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted March 30, 2012 Author Share Posted March 30, 2012 It does help a bit thanks but remember the turbos will always be quieter anyway over the Na. Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted March 30, 2012 Author Share Posted March 30, 2012 Mods can delete this thread now as minus any information regarding manifold rasp I think the thread has run its course. Quote Link to comment Share on other sites More sharing options...
Littler Posted March 30, 2012 Share Posted March 30, 2012 (edited) I'll have a custom 2.5" SS with a large single box coming off my TT soon, not sure as it's a single box it would be to loud on an NA but as the single box is large my TT is quiet as hell, obviously the turbo's take a lot of the noise away but the difference between say mine and Paul's 3" single box on another TT is tremendous (both with cats in)! So could imagine the twin box system giving a nice noise level. Edited March 30, 2012 by Littler (see edit history) Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted March 30, 2012 Author Share Posted March 30, 2012 I'll have a custom 2.5" SS with a large single box coming off my TT soon, not sure as it's a single box it would be to loud on an NA but as the single box is large my TT is quiet as hell, obviously the turbo's take a lot of the noise away but the difference between say mine and Paul's 3" single box on another TT is tremendous (both with cats in)! So could imagine the twin box system giving a nice noise level. Paul's twin box rates at 87db with a 2nd decat only, I have the 1st decat manifold combination as well so it should bring it back in line a bit more as I can't really take it even near 3k revs in a built up area without causing a scene, I just wish the rasp would feck off though. Quote Link to comment Share on other sites More sharing options...
Noz Posted March 30, 2012 Share Posted March 30, 2012 i had 2.5" single cat with one 3" decat and stock manifold. was loud! got knows what double decat and manifold would be like. your get rasp with it slightly. ive shown you the video i had didnt i? dont get rasp know i have a 3" boosted down pipe Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted March 30, 2012 Author Share Posted March 30, 2012 The rasp/tinny noise is unbelievable when I get to 3.5-4k revs but it is fun in Hindheads near 2mile long tunnel. Your video still sounded loud on your 2.5 single box hence why I will have to buy the whifbitzs sometime instead. I am under no illusions that the rasp would go with the twin box but I am certain it will mask it to some extent. I was tempted to just get another back box as mine has the baffle cut out which makes the tin rasp worse due to the large space it has to drone. Most the back boxes I have seen are just as expensive as a near new system and on the group buy idea thread Paul kindly offered to sell it for £359 delivered which is the same as the single box. It annoys me when I am at lights ect it just sounds like I am trying to race everywhere due to excessive noise around 3k revs and I would much rather tone it down so now and then I can open it up a bit without people hearing me coming half a mile away. Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted March 30, 2012 Author Share Posted March 30, 2012 I dont get rasp know i have a 3" boosted down pipe I know it is a double post but Noz rub it in you swine why don't you Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.