RE: Lanier F-4 Phantom
Which Magnum? Is it the 52 (Blue head)? If so, those are actually pretty strong engines (from what I have seen at the field-) As long as there are no air leaks around the carb.
If you want a Pre-tuned system check either MACS or Tower Hobbies for a tuned pipe/header combo. I am pretty sure the pipe/header for the OS-46FX fits the Magnum series- (May wanna double check tho)
You can get either a quiet pipe or a regular tapered pipe- the regular pipe is VERY LOUD so if you have a DB limit get the quiet pipe-
Other options are Ultrathrust Muffler, similar price to the pipe combo less hassle bolt and go-
Or throw a Tower muffler ($13-) on there for a quick 600-800 RPM's 'til you get used to it and get a YS-
Just thoughts, your mileage may vary,
james