Exhaust man

Firstly 3" will flow 3", and whether it is split or single 3" if will still flow 3". The reason for the split is to stop the turbulence caused when the wastegate opens, we can all establish that. The next thing is to make sure you have a long enough split. If the separated pipe is introduced to early you end up with turbulence again (eg the jap branded version 1 split dumps on sr20's RB25's and even RB26's). What we have found is that you have to introduce the waste gases after a certain point to start an extraction effect, same way we design Headers(Extractors). Back to the bigger bell mouth. Yes Bigger is better than some split designs, to give an example. In the XR6 Turbo's, people pull off the split 3" designs and go for a single 4" design, gaining more torque and top end power, but the difference here is that the XR6 has heaps of room for a big dump, where the M35 does not. With this info at hand We tried for a 1 piece design, but required donut bends to be used as the first bend of the dump pipe, hence providing more work for no more power. You will notice that in the photo of the single dump of the single design thats floating around on the forum that the first bend is a different shade to the second bend, this shows me that the first bend has been casted and welded to the flange and the second bend (a standard mandrel bend) has been welded on to the casted piece.(outlined in my illustration) Now the M35 has very little room, so the split design is the most efficient for power, torque, and clearances to the body. Back to the question "wouldn't a bigger bell mouth exhaust flow more?" the answer is yes, but a 3" single flows the same as a 3" split but the 3" split extracts the gasses out better and more efficiently giving you better torque and power. Angus, now since you asked I will work out a group price for forum members but would require a show of hands (PM Preferred). But as I said I am not here to be the Jim's Mowing Man and cut your turf or your dump pipe, but offer M35 Enthusiasts a good quality product. PS. we also do Ceramic Coating, and yes it is the Made in USA stuff E-Man

I am he, as for the split sizes I am un-sure. As I said at the start of the conversation I am not hear to cut anyones grass, just to provide advice and receive feed back. Here is the punch line, I did mention to you about the dump being available on the market soon, well it's available now. E-man

Hey Guys, First thing is first, yes I am in the Exhaust industry, and Secondly I am not here to cut anyones Grass with the Group Buy thats going on at the moment. What is the general feel on Dumps, Split or single on the M35's? E man