Did the DM FoST manifold swap this weekend. Took a little bit of time since I nearly cross-threaded a bolt into my head. Luckily the local hardware store had an appropriate tap to clean up the threads. I also had to shave down the FoST manifold a tad bit to nudge it to the passenger side. Not a bad install. Idle STFT and LTFT both sit at around 0 now. Treadstone piping can eat a giant AIDS dick.
Tips:
- Assemble the vacuum block while the manifold is not installed. I pointed the two smaller fittings downward and the larger fitting towards the 1 o'clock position. Mind the O-ring; that little fucker caused a massive vacuum leak and a slight case of panic. Luckily DM includes an extra.
- The throttle body can be fed up from under the car because the wiring can be a major pain in the butt if you install it to the manifold and then try to fit it downward.
- On the gen2 I got away with using a 1 ft 180* bend, 1ft straight, 1ft, 45* bend, a couple of bump couplers, a silicone 1" T in bpv adapter, and a triple bung to assemble a cold pipe. You can get everything from siliconeintakes. Thanks to
@Faeker for the pic in his for sale thread. I had to shave down the corner of the radiator support with a dremel to prevent some rubbing.
- The dipstick is a pain in the ass. You'll likely have to bend the attached bracket and the pipe itself to make it fit. You will not be reusing the big ass stupid bracket that holds a bunch of wiring.
- Matt said that you can pop off the cage around the MAP sensor to make it fit straight on. I used the bolt holding it in to feed the sensor into the manifold. Either method will allow for a seal.
Update here:
https://mazdaspeeds.org/index.php?threads/neganoxs-cats-cant-drive-build.572/page-3#post-38396