Part # 1004375 w/stainless steel blunt cut tips
Part # 1004370 w/stainless steel angle cut tips
Part # 1004385 w/painted blunt cut tips
Kit fits ‘73-’87 full-size GM 1/2 & 3/4 ton pickup, 2WD & 4WD,
all wheel bases, w/305 & 350 c.i. motor only and 2-1/2” exhaust at
the
converter.
Heartthrob exhaust systems are manufactured
in--Litchfield, MN
DANGER WARNING: Should the purchaser decide to install this
exhaust product at home, be warned that pleasure car or light duty
truck/van “bumper” jacks are intended for emergency use only. The
use of frame contact jack stands in conjunction with a floor jack as
main support is highly recommended to minimize accidental dropping of a
vehicle while the installation proceeds.
Limitation of liability--Disclaimers: The regulation of emissions
production, noise levels and safety standards is undertaken by the
federal government, each of the fifty state legislatures, and by many
local municipalities, towns and counties.
The manufacturer makes no warranties of
merchantability, of fitness for a particular purpose, or that its
products are approved for general use, or that its products comply with
laws, regulations or ordinances in the states where they may be sold to
the ultimate purchaser, the consumer.
The entire risk as to the conformity of this product
in any such state and as to repair, should the product prove to be
defective or non-conforming, is on the retail purchaser, the buyer, the
ultimate consumer of such product and it is not upon the seller,
distributor, or manufacturer.
In this connection, retail purchaser, the buyer, the
ultimate consumer assumes the burden of the entire cost of any and all
necessary service, alterations, and or repair.
The foregoing statement limits the liability of the
manufacturer.
HARDWARE KIT:
3) 5/16” nuts
3) 5/16”
x 1” bolts
3) fender
washers
6) 2-1/4” clamps
3) 2-1/2”
clamps
3) 5/16” lock
washers
1) left tail pipe
1) right tail pipe
3) THU900 (BR91930) swinger
hangers
2) muffler tips--stainless or painted 1) front
extension pipe
1) y-pipe
NOTE: do not tighten any clamps or nuts and bolts until the last
step!! Before cutting any pipes it is a good idea to lay out all
the included pipes along side the vehicle and get a good idea of how
the pipes will hang on the vehicle. Please read the instructions
fully and thoroughly before you begin.
INSTRUCTIONS:
1) Remove the old exhaust system from behind the converter,
leaving the converter, front y-pipe off the manifolds, and the O.E.
hanger mounts and the front O.E. hanger on the truck. Note:
we recommend pulling the spare tire for this system. If you would
like to keep the spare tire in the original position, see paragraph two
of step 2).
2) The extension pipe will need to be cut for those without a 2WD
long box truck. For 2WD short box and 4wd long box, cut 17” off
the front pipe from the end that is not expanded. For 4WD short
box, cut 34” off the front pipe from the end that is not
expanded. Install the extension pipe to the converter using a
2-1/2” clamp. Be sure to line up the notch on the pipe to the
O.E. converter.
To keep the spare tire in its original location, you may need to trim
off up to an additional 4” from the extension pipe. This will
move the system forward. You will then need to tie off the brake
line that is in the way of the passenger side tail pipe at the rear
differential.
3) Install the inlet of the y-pipe to the extension pipe using a
2-1/2” clamp.
4) Use a 2-1/2” clamp to connect the O.E. front hanger (re-use
old hanger) to the extension pipe.
Note: an additional THU900 swinger hanger has been included for
those who do not have the O.E. front hanger, or for those who prefer
how the system hangs with the swinger hanger. To use the swinger
hanger instead of the O.E. hanger, locate a hole in the frame above the
extension pipe (drill a 5/16” hole if none is present). Bolt the
swinger hanger to the frame using a 5/16” x 1” bolt, nut, lock and
fender washer. Clamp the swinger hanger to the extension pipe
using a 2-1/2” clamp.
5) Install the left tail pipe (5 bends) to the y-pipe using a
2-1/4” clamp.
6) Install a THU900 swinger hanger to the frame (using a 5/16” x
1” bolt, nut, lock washer, fender washer) above the left tail pipe
between the last two bends of the tail pipe. If no mounting hole
is present, drill a 5/16” hole in the frame. Use a 2-1/4” clamp
to clamp the swinger hanger to the left tail pipe.
7) Install the right tail pipe (6 bends) to the y-pipe using a
2-1/4” clamp.
8) Install a THU900 swinger hanger to the frame (using a 5/16” x
1” bolt, nut, lock washer, fender washer) above the right tail pipe
after the last bend of the tail pipe. If no mounting hole is
present, drill a 5/16” hole in the frame. Use a 2-1/4” clamp to
clamp the swinger hanger to the right tail pipe.
9) Trim the tail pipes to your desired length (be sure to account
for about 3” of the inlet of the tip).
10) Install the tips to the tail pipes using 2-1/4” clamps.
11) Tighten all clamps and bolts and check the system for rattles
and clearance of all brake and fuel lines, chassis components, and
spare tire if applicable.