I've been meaning to post this for a while now, just never got around to it. Just an unbiased comparison of Kooks 1 3/4" headers vs. Kooks Signature Series headers for curious minds.
Both graphs were my car with the same tune both times.
Mods to the car at the time were:
k&n cai, udp, 218/222 .563/.566 cam, stock ported intake & throttle body, magnaflow catback, prc stg 1 ported heads
Smaller curve is with the 1 3/4" headers & larger power curve is with the stepped headers.
Its a great comparison,but is it really worth that much more money for that little HP gain.JMO
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GMM Rip shifter
Taylor Red 10.4 race wire's
LPE cold air intake
LS7 clutch
(Nsofokles's)BMR STB
(City Goat's) Hotchkis sway bar's
1 3/4 Kooks headers
Full pedders suspension all installed by Black Devil
Member of the 170+MPH club
Black chrome twins,just ask Danny(DJJONESIVS)
351rwhp 350rwtq Bone stock,Dynoed at Kaltech
They are worth it imo
the torque it provides Is no joke
10 more ft lb is a big deal
True story...I put down 376/393 with the mods in my sig, basically just full exahuast and tune. After I got off the phone with Brandon my Sig Series were very close in price to the regular Kooks.
Its a great comparison,but is it really worth that much more money for that little HP gain.JMO
The SS headers are $300 more than standard headers. In my mind..if I am spending $1000+ on headers that give me 30rwhp..I really don't see spending $300 more for 10 HP/10FT/LB TQ unreasonable. People spend that kind of money on CAI's all the time that do not make that much of a difference.
The SS headers are $300 more than standard headers. In my mind..if I am spending $1000+ on headers that give me 30rwhp..I really don't see spending $300 more for 10 HP/10FT/LB TQ unreasonable. People spend that kind of money on CAI's all the time that do not make that much of a difference.
Wouldnt it be a more fair comparison to run them against the regular Kooks 1 7/8 headers ?? Of course you are going to get more power with these over 1 3/4 headers on any car. Is someone going to actually see 10HP/10TQ compared to the less expensive $900 1 7/8ths Kooks ? Would be nice to see comparisons between those two headers to justify the added cost IMO.
So its $1400 for those with catless mids and $1600 with catted mids. For that much money one could buy a really nice cam/spring package, other headers AND a CAI. Thats a lot of dough for headers as nice as they are.
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05 GTO A4 IBM / Vararam intake, Ported TB, LS2 Portworks intake, 1.9 rockers, Spintech, res delete, Tune, 5K HIDs
*12.57@113.6 MPH Street tires No headers no cam *
12.83@110.4 pre rockers.
05 300C Hemi stock 14.3@98 MPH 2.2 60 ft =?(
01 GTP 3.8 liter 62-1 turbo,IC, rockers 7.9@90 MPH/12.4@113 MPH with crappy 2.0 60 ft @ 15 PSI
Last edited by dlively11 : 10-31-2009 at 10:28 AM.
Wouldnt it be a more fair comparison to run them against the regular Kooks 1 7/8 headers ?? Of course you are going to get more power with these over 1 3/4 headers on any car. Is someone going to actually see 10HP/10TQ compared to the less expensive $900 1 7/8ths Kooks ? Would be nice to see comparisons between those two headers to justify the added cost IMO.
So its $1400 for those with catless mids and $1600 with catted mids. For that much money one could buy a really nice cam/spring package, other headers AND a CAI. Thats a lot of dough for headers as nice as they are.
It looks worthwhile to me. Don't get me wrong; I would not swap an exisiting set of headers for them but shopping for a first set these seem worth it. People will spend $300 for a CAI to add 10 hp so why not get the better headers for the same amount?
It looks worthwhile to me. Don't get me wrong; I would not swap an exisiting set of headers for them but shopping for a first set these seem worth it. People will spend $300 for a CAI to add 10 hp so why not get the better headers for the same amount?
I cant argue they are very nice and price not being an object that is what I might get as well. I am still curious as to how they compare with the Kooks 1 7/8s that are $300 less rather then compared to the smaller 1 3/4 Kooks. The stepped headers go to a 1 7/8 so it will flow better then a 1 3/4 header. I am thinking they will be very close if not the same numbers but only one way to find out.
On a stock cube LS2 you would probably not see any gain in the numbers with the 1 7/8 vs. the 1 3/4. You would probably end up losing some torque as well.
The SS headers are $300 more than standard headers. In my mind..if I am spending $1000+ on headers that give me 30rwhp..I really don't see spending $300 more for 10 HP/10FT/LB TQ unreasonable. People spend that kind of money on CAI's all the time that do not make that much of a difference.
I dont know about you but 300 is alot to me.Just dont think 9hp and 10trq is worth it.I have a set of 1 3/4 kooks headers to put on.I think those will be worth it.Thats JMO
I will be ordering some motor mounts from you though,I still think that Maryland Speed is one of the best sponsors on here.
Good to see back up test results of the torque improvement. 10 ft-lb is worthwhile, should feel it on the street.
The SS Kooks are on my "after" Christmas list.
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2004 GTO Phantom Black M6
06 Brake setup, Hawk HPS pads, RE01Rs, drag bags
GT2-3 cam, Ported TB, UDP, Svede1212 OTRCAI
Complete Street Tune by Andrew
Kooks Signature Series LTs with cats-to be installed
1967 Firebird convertible, Porsche India red
455 M20
2009 Jeep Wrangler "X" 2 door, Black/Black M6
Wife's new ride
Haven't dynoed my set-up yet but soon will. The torque increase was pushing the limits of the stock clutch. Had to upgrade to a Monster level 3 to hold the extra power. Granted, I went from stock manifolds to Kooks SS stepped, so the increase is more dramatic.
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2004 GTO M6 PBM/RED - 292 HP/328 TQ before headers
Kooks SS w/cats & stock CB
GMM Race
Toyo T1Rs
Optima Red Top
Monster lvl 3
Pedders Extreme Xa's & RR bushings
Maverick Man CF spoiler
Svede1212,Kircher21 splitter & 3.91's waiting on install.
1972 Firebird Esprit,Forest Mist Green ,Pontiac 400/TH400, Ram-Air hood,HEI,Performer,Holley 600,Hooker 1 5/8 LT's,custom 2.5" exh w/ Flows, AND T56 WAITING TO GO IN!
2005 GTO Owner
True But...
