I would go with the 2009 front end plastics & the COBE, or SPG bumper
OR the SPG or Treedog bumper on your stock bodywork (2005-2008 IQ-RMK).
You will need to delete the radiator on your sled to run the bumper.
The TCP bumper for the 2008 and earlier is ALUMINUM.
I have been in constant contact with Max, the owner of TCP and Dusty, the fabricator of the TCP bumpers since before they were offered.. they have
never been made of anything other than aluminum.
The TCP and some other aftermarket bumpers are like "subframes" that actually help to strengthen the bulhead.
It has been beaten to death on here about the bumpers "sacrificing" themselves to protect the bulkhead.
Not really a valid point, IMO.
From experience with this chassis and helping with the design of bumpers for this specific chassis... If you hit something hard enough to bend the bulkhead with good aftermarket bumper... you would have taken out the bulkhead anyway and much more with it.
If you centerpunch a tree or rock with the IQ-RMK you will do MUCH more damage to the sled than just replacing a bumper or nose pan. Count on a new pipe, muffler, hood hinge, fenders, bumper, nosepan, grille hood, motor mounts and other items that get bashed. I have seen blocks get split from hard impacts that shoved the pipe so far back and so hard that engine gets crammed into the steering post. Bulkheads at $1000 are cheap compared to engines and ALL the other bodywork.
F-Bomb:The 09 bumper assembly is what we've been asking for so that resolves the front end issues but you'll still crack your side fenders if you are an aggressive free style rider. They poke out and are the first thing that hits so there is nothing you can do about it other then don't land like that!
IMO, protect your investment with a good bumper. The TCP, CO-BE, SPG, and Treedog bumpers are a big improvement in the sled that the factory cannot afford to install on the sled.
I have personally put my sled(s) into trees with the TCP bumper (and without). NO damage to the bulkhead and relatively no damage to the other parts (scratches and gouges from branches and a cracked headlight from a branch).
According to Mike VanAmburg and other chassis "gurus" out there.. the IQ-RMK is, hands down, the strongest bulkhead out there... the bumper will only help to protect the sled and your pocketbook.
Also, the stock 2009/10 Polaris bumper uses flimsy bumper mounts (tabs) to the bulkhead. I have seen these tear out and allow the straigh ends of the bumper to "skewer" the bulkhead. Also, the stock 2009/10 polairs RMK front bumper is little more than a thin walled aluminum with the ends crimped flat to join to the tabs.
IMO, the stock 2009 bumper is little more that a U-shaped "grab handle" that will deflect the hit to either side of the bumper and take out other plastic and a-arms. No belly pan protection is offered with the 2009 bumper.
BTW... also Engineering degree with 25 yrs experience in design and fab. Super Dave3 is one of the best Polaris Master techs I've met.
Here's some good threads.
http://www.snowest.com/forum/showthread.php?t=76929
http://www.snowest.com/forum/showthread.php?t=78621
Here is a photo of my old 900 with the TCP bumper on it... polished up. Obviously aluminum.
Photo of the TCP bumper prior to bodywork install (Rideguy)
Pic of IQ-RMK bulkhead from bottom.
Heres what happens to a 900 with a LIGHT bump into a tree...