WHAT IS IT? Built for the 2016 KTM 450SXF, the T- 6
and Ti- 6 are the sixth generation of Pro Circuit’s four-stroke exhausts. The T- 6 is built from stainless steel,
while the Ti- 6 is titanium. There is also a slip-on version
and AMA/FIM-legal 112 dB Pro Series.
WHAT’S IT COST? $999.95 (Ti/Ti/carbon end
cap); $779.95 (stainless/aluminum);
$464.95 (stainless/aluminum slip-on).
CONTACT? www.procircuit.com or (951) 738-8050.
WHAT STANDS OUT? Here’s a list of things that
stand out with the Pro Circuit T- 6 and Ti- 6 exhaust
systems for the 2016 KTM 450SXF.
(1) Options. Pro Circuit sells the Ti- 6 for $999.95 (with
Ti header, titanium muffler and carbon end cap) and the
T- 6 for $779.95 (with stainless steel tubing, aluminum
muffler and stainless end cap). Both pipes, save for the
Ti- 6 Pro Series, come with a removable spark arrestor. If
you are wondering what the differences are between the
T- 6 and Ti- 6, besides the obvious metal choices, which
result in the Ti version being lighter, there are none.
Both pipes share the same dimensions, horsepower
( 2) Sound debate. The AMA Pro sound limits are
constantly changing. They have gone from 99 dB to 94
dB to 115 dB (at 2 meters) to 112 dB (at 2 meters). To
its credit, Pro Circuit has built every system to meet
the AMA Pro sound limits; its competition didn’t. Pro
Circuit’s new T- 6 and Ti- 6 systems aren’t choked down to
meet the AMA Supercross standard, which only affects
500 Pro riders. They are equipped with a larger perf core
and end cap for improved throttle response—and they
still meet the AMA Amateur sound limit. AMA
Pro riders can order the Ti- 6 Pro Series, which meets the
current 112-decibel two-meter-max standards.
( 3) Fitment. The biggest problem with installing the
Pro Circuit Ti- 6 is that you have to remove the stock
system first. KTM uses a one-piece head pipe that runs
all the way to the muffler. It’s cheaper to make but a
major pain to deal with. Pro Circuit has a slip-fit between
the head pipe and the mid-pipe that makes installation
and removal much easier. The Ti- 6 weighs 2 pounds less
than the stock KTM exhaust system.
( 4) Performance. This is an incredible exhaust pipe.
On our dyno tests, it pumped out 61 horsepower over
the stocker’s 58 horsepower. This pipe romps. It made
more horsepower at every point on the powerband—from
6000 rpm all the way to the 11,000 rpm rev limiter. Best
of all it mimicked the stock curve, but with 1 horse more
at 7000 rpm, 1.5 horses more at 8000, 2. 3 horses more at
9000 rpm, 3. 7 horses more at 10,000 rpm and 3 horses
more at peak (9600 rpm). With the stock exhaust on our
2016 KTM 450SXF, we ran one tooth more on the rear
sprocket to up the oomph from gear to gear. With the
Pro Circuit Ti- 6, we could easily run the stock gearing to
the same effect. Every test rider appreciated that the
Pro Circuit exhaust kept the same smooth powerband
that he liked so much, but with the added benefit of
magnifying the power at every step along the way.
WHAT’S THE SQUAWK? To install the Pro Circuit
pipe, you have to remove the stock one. That means
removing the shock first. Additionally, the $220-cheaper
stainless steel T- 6 makes the same power as the Ti- 6.
If you’re a 2016 KTM 450SXF owner, you
should want this pipe and the power increase
that comes with it.
PRO CIRCUIT TI- 6 KTM 450SXF EXHAUST
MXA TEAM TESTED