View Full Version : exhaust queston

02-13-2011, 7:43 PM
so im getting to the point where i need to build/get some pipes, and my head has the 1.75" aluminum spigots welded in, do i need to cut some kind of a flare in some 1.75 tubing to slid them over and clamp? or am i missing something here? the wleded on spigots are kinda chewed up from the previous owner trying to bang some pipes on, so i dont really wanna fuck em up anymore...

02-13-2011, 7:57 PM
I wonder if maybe you can bevel the spigots?

02-14-2011, 8:33 AM
does 1.75 tubing just slip over the spigots on your bike?

02-14-2011, 8:52 AM
it's a weird number like I.D. 1.6something I remember seeing it on someones thread maybe trumpnuts old video of how to build a exhaust or it was on a lowbrow diy or something ...duh i have a push in spigot and tape right in front of me ...right between 1 and 5/8 closer to 21/32 to be exact ...That is ID of your pipe ...that's what this spigot I have measures anyway

02-14-2011, 10:30 AM
got it, so basically i can just find some pipe with whatever my ID is on the flange, and kind of use that as an adapter to some 1.75 tubing and thus nut have to flar the tubing or anything like that?

02-14-2011, 12:57 PM
You can go to a auto parts store and get a Swedged adaptor . If you plan on running 1 3/4 pipes the get a swedged adaptor that goings from 1 3/4 O.D. on one end to 1 3/4 I.D. on the other . . Just remebr if you plan omn running 1 3/4 you will lose your low end exhaust velocity unless you time and run a collector pipe . I would recomend 1 1/2 it loses a bit at the upper end ( over 6500 rpm ) but it gives more power in the low end .

02-14-2011, 2:26 PM
thanks for the advice man, i appreciate it. i already got some 1.75 tubing and bends so i think ill just use, i can always make some more later. ill go get that adapter!