K&N AND UNI AIR FILTERS
The XP 1000’s stock paper air filter does a great job of
filtering dirt and providing your engine with healthy, clean air;
however, its major downfall is that you can’t clean or service
it. In dusty conditions, the stock air filter can be completely
hammered in a few hundred miles. Reviving it will cost you
a trip to the dealership and about 35 bucks for a new filter.
Stock replacement filters from Uni and K&N increase
airflow and does every bit as good a job filtering, yet you
can easily service them with cleaner and filter oil. The
K&N filter is known as a million mile filter in the automotive world and will undoubtedly outlast the life of
Adding a dry charger pre-filter will increase the
time between service intervals and keep water out in
extremely wet conditions.
www.knfilter.com; $99, filter; $54, dry charger
The stock suspension is really
impressive in deep whoops, braking
bumps and G-outs, but it could use
some serious help in a few other key
areas. One of these “key” areas is limiting body roll. Both Walker Evans and
Shock Therapy have extensive re-valve/
re-spring packages that improve handling across the board. Both companies update to a better dual-rate spring
and crossover setup, providing huge
improvements in cornering and off-camber feel. Shock Therapy also has
steel shock bodies and front and rear
sway bars for maximum side bite.
LOWER HALF-DOOR INSERTS
The Polaris RZR quarter doors are designed to contain passengers’ arms and
legs and to protect against side impacts with brush, limbs, trees, etc. They are
built well, and the latches work great and don’t rattle. Where they totally miss the
boat is keeping the driver and passengers clean. The RZR’s front tires have a serious habit of throwing roost, sand, silt, mud and whatever else they can find right
into the void left by the stock doors.
Polaris sells a set of injection-molded lower half doors that easily install onto the
stock upper-door halves. The Polaris inserts are stylish, durable and, by working
with the stock doors, don’t rattle. Polaris gets 400 bucks for a set, but there are
now a few slightly lower-priced options from vendors like Pro Armor, PRP and a
Polaris has an accessory high-flow
air filter by Donaldson for $59.99,
and K&N’s high-flow filter can be
cleaned and re-oiled repeatedly. The
K&N pleated filter is $99, and the
dry charger pre-filter is $54.
Shock Therapy’s XP 1000 re-valve, rear torsion bar
(50 percent stiffer than stock) and dual-rate Eibach
spring kit cost $2300.
Polaris sells accessory full-door kits for $399.99, and there are 10 wraps, including the lower door decals,
for $599.99 each. PRP Seats has aluminum lower door panels for $239 and $449 for the XP 4 1000.