[Mat0302]

estimated size... I beleive my OEM were 1.25" and these B12 are 1.75" tubes. The mid-pipe connector is the same, but not sure of the size. That's about all I know.

[The CyberPoet]

estimated size... I beleive my OEM were 1.25" and these B12 are 1.75" tubes. The mid-pipe connector is the same, but not sure of the size. That's about all I know.

That doesn't sound right to me... I can't imagine them being 1.75 at the down-pipes...
Also: remember, inner measurement (ID) is the critical one -- OD is effectively irrelevant.

I remember measuring the OEM 98+ 600 & 750 pipes with a micrometer at one point and posting the results to KR, but all I can find is that I calculated it out to be a 23% area-difference between the two:

http://katriders.com/vb/archive/index.php?t-53482.html

and

http://katriders.com/vb/showthread.php?t=65478

Cheers,
=-= The CyberPoet

______________________
CyberPoet's KR Specials
Suzuki Stratosphere - 6 Cylinders, the new Katana?
The Best Motorcycle Metal Billet Tire Valves in the World, plus lots of motorcycle & Katana (GSX600F / GSX750F) specific help files.

[Rok_Stars_Bars]

When I measured my headers it was

The B12 header I.D. is 28.9mm (1.141 inch)
The Kat 600 header I.D. is 26.03mm (1.025 inch) (theses are my measurement I took. The measurement werre taken about 1 1/2inches into the exhaust inlet of the header with a telescoping gage and a digital caliper.)

My thread http://katriders.com/vb/showthread.php?t=85087

[Mat0302]

That doesn't sound right to me... I can't imagine them being 1.75 at the down-pipes...

I went to measure, they are a tad over 1.5" at the down-pipes (outside dim.)

[galbraith_14]

awesome thanks guys

[The CyberPoet]

The B12 header I.D. is 28.9mm (1.141 inch)
The Kat 600 header I.D. is 26.03mm (1.025 inch) (theses are my measurement I took. The measurement werre taken about 1 1/2inches into the exhaust inlet of the header with a telescoping gage and a digital caliper.)

Those measurements sound much more "right" to me... I recall the stock 750 header being about 27.2mm...

Cheers,
=-= The CyberPoet

______________________
CyberPoet's KR Specials
Suzuki Stratosphere - 6 Cylinders, the new Katana?
The Best Motorcycle Metal Billet Tire Valves in the World, plus lots of motorcycle & Katana (GSX600F / GSX750F) specific help files.

[deanocinq]

will the exhaust headers from the bandit 1200 or 600 fit on the pre 600 if yes which would be better?

[arsenic]

you need the 98+ oil pan and pick up, which do you think would be better 600 or 1200

[deanocinq]

i dont know will either upset the engines running more , only asking sorry

[StevieB]

Naw still rides great. Just lose some low-end. Makes alot more on the top end through.

Well, there you go- "loss of low-end" is basically the same as "loss of some drivability." But glad it works for you, and you can deal with the loss- whatever you want to call it!

[Mat0302]

Well, there you go- "loss of low-end" is basically the same as "loss of some drivability."

If that's what you want to call it. maybe a loss for you, but works well for me!

[arsenic]

i dont know will either upset the engines running more , only asking sorry

the 1200 gives you top end increase. The 600 will give you NO increase. With the B12 header you will also lose a lot of bottom end, which can be corrected with GSXR cams. In other words, unless your looking to mod a bunch of stuff, don't do it, it's not gonna do anything by itself.

[Rok_Stars_Bars]

the 1200 gives you top end increase. The 600 will give you NO increase. With the B12 header you will also lose a lot of bottom end, which can be corrected with GSXR cams. In other words, unless your looking to mod a bunch of stuff, don't do it, it's not gonna do anything by itself.

"" (quote arsenic from several threads)