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Thread: Mid Length Headers
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11-21-2006, 12:12 PM #1
- Join Date
- Oct 2006
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- Tacoma WA
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- 68
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One is Puter One is Gray- 2000 Z28, 1994 Z28
Mid Length Headers
Ok I'm really stuck here. I need to know if anybody uses Mid Length Headers on there Stock LS1? If so what kind do you use, hp gains and do you maybe have any dyno print-outs to let me see the gains? Please help, any and all information will be greatly appreciated. Thank You Jamie55
You can either PM me or email me.
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11-21-2006, 12:13 PM #2
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- Oct 2006
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- Tacoma WA
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One is Puter One is Gray- 2000 Z28, 1994 Z28
Mid Length Headers
Oh yeah I forgot I have an auto transmission and the reason for the Mid Length Headers is for emission legal.
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11-21-2006, 12:15 PM #3
- Join Date
- Oct 2006
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- Tacoma WA
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- 68
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One is Puter One is Gray- 2000 Z28, 1994 Z28
Crap I forgot it is also a 2000 Camaro Z28, hey I'll get it togeather sooner or later
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11-21-2006, 12:17 PM #4
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- Broken Arrow, OK
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Pewter metallic- 2000 Camaro SS
Mac midlengths put down very good #s on a stock LS1, bout the same that long tubes would. The big advantage to long tubes is if you ever cam the motor, then the long tubes would be more beneficial than the midlengths.
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11-21-2006, 01:58 PM #5
Not sure on an LS1, but would mids keep it emissions legal? I thought only shorties would, visually anyways. Exhaust wise, longtubes can pass emissions, but from what I'm told, only shorties will pass visually.
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11-21-2006, 03:06 PM #6
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- n/w chicago
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black- 2000 nhra edition formula
anything other than a shorty header will move the cats back making it a so called no no.
that being said, mac mids are really good headers.
i have long tubes and just passed emissions this past saturday2000 nhra edition formula
a few bolt ons, 379 rwhp
11.96 @113.25
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11-21-2006, 03:07 PM #7
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- Dec 2002
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- n/w chicago
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black- 2000 nhra edition formula
get a stall conveter before headers. for an automatic car, a stall provides the best performance gains out there
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11-21-2006, 04:59 PM #8
Mac mids are no more emissions leagal than long tubes. I had em for years, good headers. Got long tubes now, even better.
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11-21-2006, 10:30 PM #9
- Join Date
- Oct 2006
- Location
- Tacoma WA
- Age
- 68
- Posts
- 7
One is Puter One is Gray- 2000 Z28, 1994 Z28
Hm it says that Gobson Mid Lengths are emission legal in 49 States. Any truth to that. I am going to up grade to Super Charging so just go with LT's. We don't have look at inspections here in WA just the sniffer. Thanks Jamie
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11-22-2006, 03:35 AM #10
Check Out This Thread
Check out this thread and there is a lot of good scoop "Dif Between Mid-Tube and Shorty".
2000 Z28 M6, SLP Lid, SLP Bellows, SLP UD,
P&P Maf, TB By-Pass, PS Shorties, LS6 Intake, FAST 78mm TB, Hooker CB, Hurst Billet, Front Tower Brace, small 218/218....527/527....114 cam.
337rwhp/348rwtq
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11-22-2006, 02:54 PM #11
Long tubes and midlenghts are illegal in all 50 states.
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11-26-2006, 05:13 PM #12
I don't think anyone picked up on this.
If WA doesn't do a "visual" inspection who cares. Since your car is OBD-II they shouldn't even do the "sniffer" test. All they'll probably do is plug in their scanner and make sure there are no codes.-98 GTP Coupe. Silvermist and stock.
-89 GTA*** L98, P1-SC, 24# SVO's, MSD 6-A, March underdrive pulleys, Edelbrock headers/catback and some other goodies.
~Tony
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