The (29-0173) '48-57
rigid pipes are a kit. Four pieces with one part number label and they pipes fit
The front header is about an inch longer
than the '58-up front header. The rear header has more "S"
in it than the '48-65 rear headers sold separately, but the "kit" doesn't have that short "Y" pipe with the extra kick in the connect-to-muffler piece. It comes with the longer (swing-arm?) type "" piece. I'll post the pics tomorrow.
Synopsis: As sometimes happens with V-Twin parts, if you want exactly the parts you need
for this rigid frame exhaust system, you must purchase the (29-0173) kit and
you must also purchase a separate (10-1/2" short version) of the "Y" pipe. When I post the pics, I'll list exactly the part numbers you need to order for the correct collection of parts.
In the catalog, V-Twin has a note that says, "You may need to remove the motor mount bolts and tilt the motor to the left, in order to fit the pipes together and then fit onto the front head spigot". Luckily my heads are not torqued yet, and I can back the head bolts off for an inch of lift instead.
This correct, short, (10-1/2") "Y" pipe is not included in the rigid frame (29-0173) '48-57 exhaust kit. A longer '58-64 style "Y" was included instead. That's not right, and if I ask V-Twin to let me return just the '58-64 "Y" in exchange for the correct 10-1/2" "Y", they will probably require me to send all the pipes back and re-issue me another kit. I'll ask them.
The set in front is '48-57, the rear header has more "S" in it. The 10-1/2" "Y" pipe is correct, but the longer ('58-64) "Y" for swing arm is what shipped with (29-0173). I'll try and return the '58-64 "Y" for a 10-1/2"
(which is chrome, (30-0199).
Here's the '48-57 pipes assembled. The only pipe that needs more bend
is the front header. It does not match up with the hub of the flat-pipe. But, the oil filter fits just fine. Since the front header is long enough, but not bent enough, we'll have to cut and weld sections of pipe to make the bend.
The cut & weld will include adjusting the contact angle for the front head spigot so it's sits squarely.
It's equally important the the brake arm has swing clearance, which this does.
This flat-pipe seam relief is ground into OEM cases:
But there isn't one in these STD cases. It may be necessary
to grind some in once you know where, and if, the flat pipe seam makes contact.