1. Remove right lower cowl as per Factory Service
/ Owners Manual.
2. Loosen exhaust clamp and while securely
supporting the stock muffler assembly, remove
the muffler mount bolt. Carefully remove the
stock muffler assembly.
3. Remove O2 sensor from the stock header.
4. Remove the header chassis mount bolt.
Note: It may be necessary to remove the two
right rearset bolts to access chassis
mount bolt.
5. While securely supporting the stock header,
remove header nuts and carefully remove the
stock header.
Note: The exhaust port gaskets will be re-used
with the Yoshimura full-system exhaust.
Inspect and replace if necessary.
Removal
Installation
1. Install (No. 1)
13320-401,
Yoshimura header
using the stock header nuts. Do not torque at this
time.
Note: Check to make sure header flanges are not
overlapping when installing.
2. Install (No. 2)
13320-419,
Yoshimura tailpipe onto
(No. 1)
13320-401,
header.
3. Secure (No. 2)
13320-419,
tailpipe bracket to
chassis using the stock chassis mount bolt and
(No. 7)
8MMNUT,
nut. Do not torque at this time.
Note: Tailpipe bracket mounts to the backside of
chassis mount.
4. Install (No. 3) muffler onto (No. 2)
13320-419,
tailpipe.
5. Install (No. 5)
HT SHLDR77,
muffler clamp
heatshield onto (No. 4)
YM7M-MPCA(X),
muffler
clamp.
3
6. Slide (No. 4)
YM7M-MPCA(X),
muffler clamp over
(No. 3) muffler. Secure muffler to the outside of
the muffler mount using the stock bolt, washer,
and nut.
7. Install (No. 6)
RACE-SPS-1,
medium exhaust
springs between muffler and tailpipe.
Install (No. 6)
RACE-SPS-1,
medium exhaust
springs between tailpipe and header.
8. Torque muffler mount bolt to factory specification.
Torque tailpipe chassis mount bolt to factory
specification.
Torque header nuts to factory specification.
9. Re-install the stock O2 sensor into (No. 2)
13320-419,
tailpipe.
Note: An additional O2 sensor bung is located on
the tailpipe for performance tuning /
mapping purposes. Install supplied O2
sensor plug if additional O2 sensor will not
be used.
10. Before starting vehicle, check for proper
clearance between new exhaust system and
rear suspension (i.e. tire, control arm, brakes,
rear shock, and etc.) If any problem is found,
please carefully follow through the installation
steps again. If problem still persists, please call
Yoshimura Tech Department at (800) 634-9166 /
in CA (909) 628-4722.
11. It is recommended that the muffler and tailpipe
be wiped down with rubbing alcohol to remove
oil and fingerprints. This will help prevent
tarnishing of the finish after the exhaust is
heated up.
Note: After starting vehicle, it is normal for new
exhaust system and muffler to emit
smoke until oil residue burns off.
4
5
Washer
Bolt
Muffler
Clamp
Nut
