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thunderheader 2 into 1

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Old 02-12-2012, 12:10 PM
G Funk G Funk is offline
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Default thunderheader 2 into 1

just picked up a TH 2 into 1 dirt cheap. how much HP/TQ should i expect over RH slip-ons and big sucker?

also what setup(power commander, air cleaner, etc) would you suggest without doing any engine work? thx ahead of time

forgot it mention i have a 07 street glide. yeah i pretty much have always like TH for the sound, never cared much for the design or quality haha

Last edited by G Funk; 02-12-2012 at 12:51 PM.
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Old 02-12-2012, 12:18 PM
mkguitar mkguitar is offline
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the T/H is a great design.

louder than I like but truly a performance pipe rather than a "style".

you a$$ dyno will feel power gains over stock headers below 3000 rpms ( you'll be noticing that you may not be downshifting as much)

the best bang for buck air cleaner these days is the Ness big sucker for under $120 on ebay from easternpc, that's the chrome version if you have a black/chrome motor

tuning etc. depends on year/model/budget/how deep you want to get into it.

On my 09 I use XIEDS ( $125) plug in and done- these don't work for everyone, but the results for me have been good

you don't list what year/model you have

The smarter you spend- the more bikes you can buy!

Last edited by mkguitar; 02-12-2012 at 12:30 PM.
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Old 02-12-2012, 12:21 PM
JCleary JCleary is offline
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Depends on what year make/model you have.

If you have an '09 49-state bike, I doubt you'll see any gains. Especially without a dyno tune. Even with a dyno tune, a Thunderheader gives you a torque dip from about 2300-2800. It's only a couple of foot-pounds, but it's there.

Top-end rush should be good. And the sound is unbeatable.

As far as tuners are concerned, either a TTS Mastertune or Dynojet Power Vision is what I would recommend. If that's too expensive, then use a Power Commander V.

XIED's do nothing for you in any throttle position that requires open-loop operation. So, essentially, anything over 3000 RPM at 75% throttle or more, or over 4000rpm at any throttle position. When you're exposing your engine to the highest loads, your engine is required to use mapping designed for a stock air cleaner and exhaust.

I just opened my map for my bagger, and took the data right from it.
Do what you want, but it's not something I would want to do to my bike.

At least with a PCV, PV, or TTS you're using a map that's close to ideal. And, with the TTS and PV you can actually tune the bike yourself.

I run Thunderheaders on both my Harleys.

Last edited by JCleary; 02-12-2012 at 12:29 PM.
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Old 02-12-2012, 12:27 PM
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pittz5 pittz5 is offline
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they really need a good tune and where I am I have gotten best results with a TTS. On my new to me RKC I am running the PC5 and I really liked the tune better with the TTS on my 09 RG. NOTHING sounds like the TH and I have tried everything. I tried the Fatcat Boss most recently and hated the sound so I went back to the TH. Quality may not be as good but damn it sounds good. On my 05 RG i replaced Rinehart TD with the TH and it was night and day above 3000rpm. This is my experience only so keep that in mind..;-)
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Old 02-12-2012, 03:58 PM
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TWIN CAM 96 TWIN CAM 96 is offline
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Thunder Headers are one of the best for HP's/Torque you should get at least 4-7 on each.
2007 Street Glide, 96Cu In, Stage 1, Thunder Headers 2 into1, K&N air filter,Sert, Cycle Visions Flasher & Run/Stop/Turn, Led Turn Signals, HD Tri-light Led Brake Light, HD HID Passing Lamps, Lyndall's Gold plus pads, Scavenger, Flo billet oil filter, Mobil 1, Redline Primary, Redline Trans Shockproof.

H.D. Is The Best The Hell With The Rest!
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