INSTALLATION INSTRUCTIONS
50-3011
1998-99 Chevrolet/GMC
Suburban V8-5.7L - with single inlet muffler
TOOLS RECOMMENDED:
TO ST ART :
9/16" deep socket
3/8" ratchet
7/8" open end wrench
15mm box wrench
rubber mallet
spray lubricant or penetrating oil
anti-seize
reciprocating saw or hack saw
pair of channel lock pliers, 10î
2. Disconnect negative battery cable and
allow vehicle exhaust to cool.
3. With vehicle raised and properly supported, using a reciprocating saw or hacksaw, cut the pipe approximately 3" behind
rear of muf fler.
4. S pray lubricant on front and rear
tail pipe hanger rubber grommets
lower hole.
5. Using a p air of channel lock pliers,
remove front t ail pipe hanger rod from
lower hole in rubber grommet.
10. Remove the three nut s on the three
bolt flange using a 15mm socket and a
15mm box wrench. You may need to use
some penetrating oil.
17. Support muf fler and inst all tail pipe (C)
from rear of vehicle, hanger end first. Slip
into muffler and put hanger rod thru lower
hole in grommet.
18. Inst all 3" clamp/hanger (G) over end
of tail pipe (C) and slip hanger rod into
hole in rubber grommet. NOTE: use antiseize on threads. Inst all turn out (D) onto
tail pipe (C).
1. Remove and inventory new JBA
exhaust.
11. Using a p air of channel lock pliers,
remove front muf fler hanger rod from
bottom hole in grommet.
6. Using a p air of channel lock pliers,
remove rear t ail pipe hanger rod from bottom hole of grommet.
7. Remove t ail pipe from rear of vehicle.
13. Inst all head pipe (A) with three bolt
flange. NOTE: we recommend using antiseize on threads.
19. Position clamp/hanger (G) over slip
joint of turn out (D) and hand tighten.
20. With anti seize on threads of 3"
front muffler clamp/hanger (E), position
and tighten completely with 9/16" deep
wall socket.
21. Position t ail pipe (C) so that front t ail
pipe hanger is level in rubber grommet.
22. With anti seize on threads, inst all 3"
clamp (F) over rear muf fler slip joint and
tighten completely with 9/16" deep wall
socket.
23. Rot ate turn out (D) to desired position
leaving clearance from body and tighten
clamp completely with 9/16" socket.
25. Using a sof t cloth, remove all print s
from turnout tip (D).
24. After installation, it is recommended
that all clamp s be retightened and joint s
tack welded in three spot s.
NOTES:
1) It may be necessary to loosen and
realign the sp are tire for proper
clearance.
2) All exhaust systems will exp and
about 1" rearward when exhaust
temperature st art to rise.
3) Use Anti-seize on threads of
clamps.
14. Inst all oxygen sensor using 7/8"
wrench. Reconnect sensor .
15. Inst all front muf fler hanger (E) thru
lower hole in grommet and over end of
head pipe (A).
16. With the JBA logo facing rear of vehicle, inst all muf fler (B) over head pipe (A)
making sure muf fler bottoms out on slip
joint.
8. Remove oxygen sensor with 7/8" open
end wrench. NOTE: unplug sensor at
cross member .
9. S pray lubricant on front muf fler hanger
rubber grommet lower hole.
12. Remove muf fler assembly pulling
towards rear of vehicle. NOTE: use care
not to damage gasket on three bolt
flange.
We recommend taking the truck to a muffler shop and having all slip connections tack welded.
Part s List
A. Head pipe 1
B. Muffler 24", oval 1
C. Tail pipe with hanger 1
D. Turn out 1
E. Front muffler clamp/hanger 1
F. 3" clamp 1
G. T urn out clamp/hanger 1
**Inst allation recommendation:
JBA recommends in most cases that the vehicle be taken to a reputable exhaust shop.
17040a
12.16.04
F
B
C
D
G
A
E
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