Flowmaster American Thunder 817664 Manuale utente
409S®Stainless Steel
Removal:
1) Raise the vehicle up on a hoist or rack to working height. If you do not have access to a hoist
or rack raise the vehicle and support securely with jack stands.
2) Using a 12mm socket, unbolt the tailpipe connection where it exits the muffler. Separate the
wire hanger on the tailpipe from the rubber mount on the vehicle. Remove the tailpipe and set aside.
3) Support the muffler with a stand, then using a 14mm socket unbolt the 4 bolts at the two front
flanged connections. Separate the wire hangers in front and rear of the muffler from the rubber
mounts on the vehicle. Remove the muffler inlet pipe assembly and set aside. Save the 4 factory
bolts, they will be reused in Installation step 1.
Installation:
1) Place the inlet pipes #86091Sand #86092S into position, and fasten the flanged connections
together using the nuts, bolts and washers included in the hardware pack.Next, place the supplied
left inlet pipe clamp hanger #384HA and the right inlet pipe clamp hanger #353HA onto the inlet pipes
and into the factory rubber mounts on the vehicle.
2) Place two supplied 2 ½” clamps over the inlets of the muffler, and then slip the muffler onto the
back of the inlet pipes. Use a stand to support the muffler. Tighten clamps enough to hold in place
but still allow for adjustment.
3) Install the left rear frame hanger #354HA across from the center of the spare tire. Locate a
square cavity on the left rear frame rail. Look up into this cavity and locate the large hole at the top of
the frame. Install the #HA566 backing plate on the top side of the frame, then place the #354HA
hanger assembly up into the cavity using the washers and nut provided. Tighten the hanger firmly
using a 9/16” socket or wrench, slide the supplied rubber hanger #HA168 onto the end of the #354HA
hanger rod. Once the hanger assembly is bolted into place correctly it will face the rear of the vehicle
(see picture).
4) Place two of the supplied 2 ½” clamps over the outlets of the muffler; then place right tailpipe
#16543S into position over the rear axle, and slide into the right muffler outlet. Connect the hanger
that is welded to the rear of the pipe into the factory rubber hanger.
Installation Instructions for:
SYSTEM #817664
2009*-2014 TOYOTA TUNDRA TRUCKS
*BUILT AFTER 08/2008
4.6L & 5.7L V-8 I-FORCE ENGINES
*ALL EXCEPT STANDARD CAB/SHORT BED &
DOUBLE CAB/LONG BED*
5) Place left front section of tailpipe #16542S into position over the rear axle and slide the hanger
on the pipe into the factory rubber mount on the vehicle while sliding into the left muffler outlet. Then
place supplied clamp over the back of the rear section. Then place left rear section tailpipe into the
front section tailpipe. Connect the hanger welded to the rear of the pipe into the rubber hanger
#HA168, installed in step 3. Tighten the clamps on both pipes enough to hold but still allow for
adjustment.
6) Slide the side exit pipes #16547S or the rear exit pipes #16546S onto the ends of both over
axle pipes and then place a 2 ½” clamp onto these slip-fit connections. Tighten enough to hold but
still allow for adjustment. Place the two stainless tips #ST461 onto the exit pipes and tighten them
enough to hold in position. Rotate the exit pipes and tips to the desired distance from the body or
bumper, so that the angle cut on the tips are in the desired location. The exit pipes have been left
long enough to allow for adjustment, they may need to be trimmed to get the desired fit.
7) Adjust the position of all pipes and muffler and tailpipe to provide a satisfactory fit. Maintain a
minimum of 3/4” clearance around all parts of the system; while keeping suspension travel and
vibration in mind.
8) Tighten down all clamped connections securely. After the system is secure, place the supplied
½" hanger keepers onto the end of the left rear upper frame hanger #354HA; slide it up to the rubber
mount to firmly hold the system in place.
9) For a more secure installation, we highly recommend welding all slip-fit connections.
PACKING LIST
Qty Description Part #
1 Muffler 8525404-319
1 Inlet Pipe Left 86092S
1 Inlet Pipe Right 86091S
1 Tailpipe, Right 16543S
1 Tailpipe, Left Front 16542S
1 Tailpipe, Left Rear 16544S
2 Rear Exit pipes R/L 16546S
2 Side Exit Pipes R/L 16547S
2 Stainless Tips ST461
1 Parts Kit PK502
7 2 ½" Band Clamps MC250BS
1 Inlet Pipe Clamp Hanger, Left 384HA
1 Inlet Pipe Clamp Hanger, Right 353HA
1 Left Rear Frame Hanger 354HA
1 Backing Plate HA566
1 Rubber Hanger HA168
1 3/8" Nut HW103
1 3/8" Flat Washer HW303
1 3/8" Lock Washer HW309
1 1/2" Hanger Keeper HW503
409S®Stainless Steel
Installation diagram for:
SYSTEM #817664
2009*-2014 TOYOTA TUNDRA TRUCKS
*BUILT AFTER 08/2008
4.6L & 5.7L V8 I-FORCE ENGINE
*ALL EXCEPT STANDARD CAB/SHORT BED & DOUBLE CAB/LONG BED*
FLOWMASTER PERFORMANCE EXHAUST EXHAUST SYSTEMS
Indice
