SLP Loudmouth

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Copyright 2004
LS1 Sounds
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Car Header Y-pipe Catback Comment
'01 Z28 MAC mids MAC catted LM  
'01 WS6 Stock SLP catted Y LM 2 Transition from stock
'00 Z28 Stock Stock LM 2 Lid
'98 Z28 QTP 1.75" LT QTP catted LM FMS F11 @ 112 cam, 900 rpm idle, tuned
'02 WS6 Hooker LT ORY LM 4.11 gears, TRex cam
LS1 T/A SLP LT SLP ORY LM TR224 112lsa cam
'99 SS Stock SLP catted LM  
'94 LT1 Stock Stock LM (1 of 3) Driveby
'94 LT1 Stock Stock LM (2 of 3) Driveby
'94 LT1 Stock Stock LM (3 of 3) Burnout
'02 SS Stock Stock LM  
'00 SS Stock Stock LM (1 of 4) Lid
'00 SS Stock Stock LM (2 of 4) Lid
'00 SS Stock Stock LM (3 of 4) TSP 220/220, 0.584/0.584" 114 lsa cam, lid (idle)
'00 SS Stock Stock LM (4 of 4) TSP 220/220, 0.584/0.584" 114 lsa cam, lid (taking off)
'96 Z28 Stock Stock LM (1 of 3) Revs and idle
'96 Z28 Stock Stock LM (2 of 3) Revs and driveby
'96 Z28 Stock Stock LM (3 of 3) Revs and in-car
LS1 SS Hooker LT ORY LM  
'02 WS6 SLP LT SLP cats LM (1 of 2) MTI C1 cam, cold start
'02 WS6 SLP LT SLP cats LM (2 of 2) MTI C1 cam, warm idle
'99 SS Pacesetter LT ORY LM TRex cam
LS1 SLP LT SLP catted-Y LM  
LS1 Z28 FLP LT ORY LM 232/232 on a 110LSA cam
LS1 Pacesetter LT ORY LM TR 224/224 114lsa
'02 Z28 Dynatech LT ORY LM G5x3 cam on a 114 LSA
LS1 WS6 Stock Stock LM (1 of 2) Closer
LS1 WS6 Stock Stock LM (2 of 2) Farther away.  To hear the same car with stock exhaust, click here!
'98 Z28 Hooker LT Hooker 3" ORY LM To hear the same car with its new true dual system click here!
'02 'Hawk Stock Stock LM Burnout
LS1 T/A Pacesetter LT ORY LM Same car as below
(after headers)
LS1 T/A Stock Stock LM Same car as above
(before headers)
'02 'Hawk Stock Stock LM To hear the same car with a stock SLP dual-dual kit click here.
  Jet-Hot
Hooker LT
Custom with
Carsound cats
LM Constrictor from LS1.com (all mods)
  Jet-Hot LT Jet-Hot w/cats LM 12.46 @ 108.5
  Jet-Hot LT Jet-Hot w/cats LM 12.47 @ 108.1
  Jet-Hot LT Jet-Hot w/cats LM 12.63 @ 108.2
'00 SS Pacesetter ORY LM  
  Stock Stock LM 13.9  vs. VW
LS1     LM #1
LS1     LM #2
LS1 Stock Gutted stock LM MTI-T1 cam
LS1 Stock Stock LM  
LS1 Stock Stock LM At the track
LS1 SS     LM WS6 has Flowmasters w/no cats

Loud, lightweight, inexpensive, and offers great airflow.  Perfect for many LS1 owners, terrible for others!  If you plan to add long tube headers or an ORY, you may want to avoid this system.  Most people say it becomes unbearably loud with tons of drone.  Some things can be done to reduce volume and drone: install cats, replace the resonator with a traditional muffler, or add a 12-18" Dynomax bullet muffler to the I-pipe to create a Dynomouth (or a Borla XR-1 muffler to create the Borlamouth).