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Car Header Y-pipe Cat-back Comment
'99 SS Pacesetter
LT
ORY   LGM G5x4 cam, LS6 intake, cutout open
LS1 Open     (1 of 3) FM-14 cam (idle)
LS1 Open     (2 of 3) FM-14 cam (rev)
LS1 Open     (3 of 3) FM-14 cam (wot)
'99 Z28 Hooker LT ORY 4" Mufflex Open cutout, TRex cam, 4.56 gears
'99 Z28
(1LE)
Kooks LT ORY Hooker TTP Equalizer V2 cam, Absolute Speed Stage II heads, LS6 intake, lid, pulley, QTP electric cutout closed then open, 437hp/405tq
'95 LT1 Jet-Hot LT None None To hear the same car with true duals, click here!
'98 Z28 Pacesetter
LT
TSP ORY SLP DD Vig 3200 stall, small exhaust leak at the Y/I junction
'98 Z28 Pacesetter
LT
TSP ORY SLP DD Vig 3200 stall, small exhaust leak at the Y/I junction (in-car)
'02 SS QTP 1.75"
(high velocity
merge collectors)
QTP Y
(w/dual
electric cutouts)
SLP 2otl TEA 1.5 5.3L heads, TSP 231/237 cam, FAST 90mm intake and TB, full bolt-ons.  The series: idle, idle & revs, 1st gear stab, all cutout closed, then cutouts open.
'98 T/A Stock Stock Hooker
Aerochamber
Open cutout
'00 Z28 Stock Gutted SLP Stock SS Open 3" cutout, ported heads, TR224/224 112lsa cam
'98 T/A Pacesetter
LT
TSP ORY Magnaflow (1 of 2) Cutout open, LS6 intake, 12.29 @ 109.4
'98 T/A Pacesetter
LT
TSP ORY Magnaflow (2 of 2) Cutout open, LS6 intake, 12.34 w/1.68 60ft
LS1 T/A Pacesetter
LT
ORY None Open cutout, TSP 233/239 112 lsa cam, TSP tune
'97 LT1
Formula
Jet-Hot LT   Flowmaster Comp 224/230 112 lsa cam (open cutout @ track, to hear the same car through a Flowmaster click here)
'00 T/A Stock Stock Magnaflow Open cutout in a tunnel.
'00 SS Pacesetter
LT
None None TSP 231/237 cam, LS6 intake
LS1 Jet-Hot LT None None 383cid, HPE "S" cam, TEA Stage 2 5.3L heads 1st start
'98 Z28 Stock Stock Stock
(w/Flowmaster
muffler)
3" cutout
'95 LT1 Jet-Hot LT None None  
  LTs ORY   Almost a drive-by...
'99 Z28 Jet-Hot LT None None  
'02 WS6 Kooks LT      
LT1 Hooker LT 3" ORY Hooker
(muffler)
Cutout open right before muffler, cc306 cam
LS1 MAC mids ORY SLP 2otl B1 cam: 221 dur., 0.558" lift, 114 LSA  (To hear the same car through the 2otl catback, click here!)
LS1 Flowtech LT None None Custom TR cam
To hear the same car through a Flowmaster catback, click here!
LS1 Z28 Pacesetter
LT
ORY TSP
Rumbler
Dual-cutouts-open, TR230/224 0.575/0.563 111LSA cam, Stage 2 heads, untuned.  Click here for the same car with the cutouts closed.
'97 LT1
Z28 M6
Jet Hot LT 3" ORY Borla
(open)
Dual Flowtech cutouts
'99 SS Hooker LT ORY   Open cutout, G5X1 cam
LS1 TA FLP LT FLP ORY Magnaflow Open cutout, MTI Stealth II cam
LS1 Pacesetter
LT
None None TSP 231/237 cam, PP Stage 2 heads (untuned)
LS1 Hooker LT Hooker ORY B&B Triflo Hotcam, open cutout (pulling into the garage)
LS1 Hooker LT Hooker ORY B&B Triflo Hotcam, open cutout (same car as above, doing a driveby)
'98 Z28 Stock Stock Stock My car with an open cutout behind the axle, before the muffler (revving)
'98 Z28 Stock Stock Stock My car with an open cutout behind the axle, before the muffler (revs and part-throttle driving)
LS1 Kooks LT Kooks Y Flowmaster
(80 series
muffler)
Comp 224/228 nitrous cam
(cutout gets opened for a few revs at the end)
LS1 WS6 MAC ORY Corsa Open cutout, GTP heads, MTI X1 cam
LS1 SS Open None None Comp Cams XER 230/236 112lsa w/0.605/0.610 lift
LS1 Stock Stock Stock Cutout open
LS1 'Hawk Stock then
QTP LT
Stock
then ORY
SLP DD
(OEM)
This clip starts out with a stock LS1 Firehawk SLP dual-dual exhaust, then shows post-installation of QTP LTs with a closed cutout, then the cutout is opened, and finally there's an idling comparison with the cutout open/closed.
TA Open None None No details at all, it has a nice cam lope though!
'02 WS6 Jet-Hot LT ORY   Cutout open, Comp Cams 224 cam (#1)
'02 WS6 Jet-Hot LT ORY   Cutout open, Comp Cams 224 cam (#2)
LS1 My stock '98 Z28 exhaust next to an '02 WS6 with Jet-Hot LT headers, no cats, an open cutout, and a_224 cam (revving) (same car as above)
LS1 SLP LTs None None  
LS1 Open None None  
LS1 SS QTP LT     Dual cutouts open (driveby)
LS1 SS QTP LT     Dual cutouts opening and a burnout
LS1 QTP LT     Camaro roasting the tires #1
LS1 QTP LT     Camaro roasting the tires #2
LS1 QTP LT     Dyno
LS1 QTP LT     Project Platinum
LS1 QTP LT     Electric cutout demo #1
LS1 QTP LT     Electric cutout demo #2
LS1 QTP LT     Electric cutout demo #3
  FLP     Dual cutouts open
LS1 SS FLP     230 cam (idle)
  FLP    

Idle

  FLP    

Rev

  FLP    

Hard launch

  FLP    

Heads & Cam

The following information was provided by JRP @ ls1tech.com:

Shorty headers offer minimal power gains if any at all, but may be your only option if you want to remain 100% smog legal and/or obtain a C.A.R.B. certification.  Mid-length headers offer better gains than shorties, but aren't as good as full length headers.  Full length (or long tube) headers offer the best power gains, but are not smog legal (although some stations will still pass your car if they see cats) and may scrape on lowered cars.  SLP LT headers are notorious for hanging lower than the other brands, and causing problems with lowered cars.

Any headers besides shorties will require a new Y pipe!

Long tubes are by far the most popular headers.  To a certain extent, the old adage of "You get what you pay for" rings true.  Here is some info on a few of the more popular choices.  It by no means covers all of the long tubes available:

Pacesetters: Extremely popular due to their price, they can be bought coated for under $400.  Quality is very good for the price, and the welds and collector are good.  If youíre on a budget and want LT's then Pacesetters should be at the top of your list.

Jet Hot/Hookers: The Hooker and Jet Hot long tubes are of the same design.  Jet Hot took the Hooker design and improved upon it a bit by moving the O2 bungs to the inside of the headers, plus they use a thicker tubing and have thicker flanges.  Both are great long tubes and will run you $500-600.

QTP/Kooks: Both Kooks and QTP are stainless steel headers, and are generally regarded as the cream of the crop.  Quality is top notch and they can be polished for that bling look if you'd like.  Their only draw back is the price: at $700+ they are not for everyone.  If you have the money or are the kind of person who wants the best, then Kooks or QTP is the way to go.  As far as Kooks vs. QTP; get whichever one is cheaper.

SLP: SLP's are the long tube that usually sparks some debate.  A lot of newbies are drawn into them because of the HP claims made by SLP.  But as already stated all LT's dyno within the same range so SLP's claims are moot.  From a quality stand point they are a great header; stainless steel and are ceramic coated.  Their major drawback is installation and lack of ground clearance.  If you plan to lower your car then pass on the SLP's or learn to change your driving style or else you'll endure a lot of scrapping.  Another drawback is the price as they are $700+.  If youíre going to spend $700+ on headers, be sure to give the Kooks/QTP headers VERY serious consideration.

FLP1|FLP2|FLP3|FLP4|FLP5|FLP6: At first glance a lot of people are turned off on the FLP setup because of the price.  What you have to understand is the FLP setup comes as a kit with the ceramic-coated headers, Y pipe, cats, and off road pipes.  When you look at it from that perspective itís a great deal and setup.  The biggest advantage of the FLP system is the ability to swap from cats to off-road pipes and vise versa at will.  Great for guys who want to run off-road pipes and then need to swap to cats for emissions requirements.

Others available but not reviewed:
-Dynatech
-Flowtech
-PPC
-Stainless Works
-Supermaxx
-Thunder Racing
-TTS

Cutouts are usually placed in the I-pipe and allow you to run an open exhaust manually by removing a plate, or automatically using an electric cutout.

When buying long tube headers, you'll need two O2 sensor extensions since the O2 bungs have now been moved farther down the exhaust stream.  Most Y/H/X pipes do not have rear O2 provisions, so you'll need to run two O2 simulators or get your computer re-tuned to prevent an SES light.

DO NOT PUT O2 SIMS ON THE FRONT O2 SENSORS!!!
(B1S1 and B2S1)

The car's computer determines the A/F ratio from the readings it receives from the two front O2 sensors when it enters closed loop operation for normal driving.

If you want to keep your AIR/EGR system in place, you may need to add air restrictor plates.

shorty headers mid-length headers long tube headers electric cutout