2004-2006 Yamaha R1 Slash Cut Slip-On Exhaust System by Akrapovic
The Akrapovic SLIP-ON exhaust system for the 2004-2006 Yamaha R1 comes with two
mufflers and two link pipes. Akrapovic has also developed an extended version with an optional Y-connecting tube. The basic Akrapovic SLIP-ON system allows
the use of the stock catalytic converter. The version with the optional Y-connecting tube extends past the point where the catalytic converter is located,
so that the catalytic converter is removed. There is no major difference in performance between the two systems. However, they both outperform the stock
system in both power and torque. The system is intended for riders who do not wish to make major exhaust system modifications.
The basic configuration of
the Akrapovic SLIP-ON system for the Yamaha R1 is as follows: the system
includes two mufflers, either titanium or carbon-fiber, attached under the
seat with carbon-fiber clamps. The muffler outlet caps are made of carbon
fiber. The cylindrical link pipes are made of titanium and are welded to the
mufflers. The connections of the link pipes to the stock header assembly are
sleeve joints secured with metal clamps. The system uses the stock catalytic
converter. The Y-connecting tube can be ordered as an option which expands
the basic configuration as follows: the basic system continues with the
optional Y- connecting tube, which is conical and made of stainless steel.
The Akrapovic Y-connecting tube replaces the stock Y-connecting tube where
the catalytic converter is located. The catalytic converter cannot be
mounted in the Akrapovic Y-connecting tube. The link pipes and the
Y-connecting tube are attached with sleeve joints secured with metal
tensioning springs as is the joint between the Y-connecting tube and the
collector.
04-06 Yamaha R1 Slash Cut
Slip-On Exhaust System Dyno Chart
Power & Torque:
Performance measurements were made on both
systems. The difference is minimal, with the advantage going to the system
with the optional Y-connecting tube, which is slightly better in the middle
of the rpm range. There is also a slight difference at the top end but this
does not affect the riding characteristics. Despite being only a first-stage
tuning component, the system adds quite a bit of power to the stock engine
figures. The standard option without the Y-connecting tube puts out 159.6 HP
at 12800 rpm. The system with the optional Y-connecting tube was measured at
159.4 HP at 12700 rpm. The torque curves of the two options are also very
similar. There is a significant increase over the stock torque curve,
especially above 6000 rpm.
Optional Y-Pipe
An optional Y-Pipe may be
purchased with the Slash Cut Slip-On exhaust system to improve air flow,
increase power and reduce weight even further. The Y-Pipe is composed of
stainless steel.
