thunderheader
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Joined: Jan 2008
Posts: 51
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From: Michigan
thunderheader
I have a 2006 street glide all stock motor i bought vance & hines header with thunder header slip ons with a stage one air cleaner plus a power commander. good system or what? is it going to be loud and sound good? and will i notice a power difference over the stock set up
Tourer
Joined: Sep 2007
Posts: 383
Likes: 1
RE: thunderheader
I have samson duals with thunderheader slipons and love the sound and look. Now prepare your self for all the horror stories from the guys with 2-1 exhaust systems. Your bike will run alot better than stock. The stage 1 is the biggest bang for your buck. The biggest thing is to get your bike dyno tuned by somebody who knows what they are doing, Which means I would stay away from the dealerships. Find a good indy.
Stage I
Joined: May 2010
Posts: 1
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BULLSHIT!!!! Thunder Header is the ONLY header that is specifically for HD!! I have an 07 Roadster w/ Scr Eagle intake Thunder 2 into 1 w/ 02 sensors and has the system "flashed" at the dealership. Noone else I ride with owns a roadster BUT THEY ALL cannot I repeat cannot Beat my roadster light to light or 1/4 mile!! Im no 100lb boy Im 300 lbs abd my roadster w/ Thunder Header hauls ***, kicks ***, and EVERYONE wants to know how I got my 07 to thump!! Simple....THUNDER HEADER!!!
Road Warrior
Joined: Dec 2008
Posts: 1,810
Likes: 4
From: Out and about
You dug up a thread from Jan '08 and then respond to it like that in your first post? You don't see any of the serious performance guys one here running T-Headers and there is a reason for that.
Stellar HDF Member
Joined: Sep 2009
Posts: 2,114
Likes: 666
A couple points to consider:
1) Tru-duals, while looking and sounding nice, cannot develop the same hp/tq below 3000 rpms that a good 2into1 can produce.
2) Thunderheader slipons are not a good slipon for power below 3000rpms.
That said, there are 2 things hurting your bottom end power.
While we still use a lot of Thunderheader 2into1's because they consistantly produce great power, the Thundercone slipons do not have anywhere near enough restriction to help low rpm power.
Also, while there maybe a few who do not think T/H's are a great pipe, I challenge them to a dyno run-off with virtually any build under 120ci.
Bring your best pipe to the dyno and we'll measure the peak performance, then slip on our shop beater T/H (boy is it ugly after 1000's of comparison runs over the past 10 years) and do a comparison.
Just sayin'
Bob
1) Tru-duals, while looking and sounding nice, cannot develop the same hp/tq below 3000 rpms that a good 2into1 can produce.
2) Thunderheader slipons are not a good slipon for power below 3000rpms.
That said, there are 2 things hurting your bottom end power.
While we still use a lot of Thunderheader 2into1's because they consistantly produce great power, the Thundercone slipons do not have anywhere near enough restriction to help low rpm power.
Also, while there maybe a few who do not think T/H's are a great pipe, I challenge them to a dyno run-off with virtually any build under 120ci.
Bring your best pipe to the dyno and we'll measure the peak performance, then slip on our shop beater T/H (boy is it ugly after 1000's of comparison runs over the past 10 years) and do a comparison.
Just sayin'
Bob
Stellar HDF Member
Joined: Sep 2009
Posts: 2,114
Likes: 666
These engines simply need longer primary lengths to be good performers.
You don't see a lot of these "and there is a reason for that".
Just my $.02,
Bob
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Road Warrior
Joined: Dec 2008
Posts: 1,810
Likes: 4
From: Out and about
Don't recall making any claims as to the superiority of my pipe, that being said I'll stick with my 88hp and 100 ftlbs out of a bone stock motor and you can keep that fugly azz TH.
FWIW, the pipe on the bike in your avatar is one we've run across over the years and have never seen them work very well, probably due to the huge difference in primary lengths.
These engines simply need longer primary lengths to be good performers.
You don't see a lot of these "and there is a reason for that".
Just my $.02,
Bob
These engines simply need longer primary lengths to be good performers.
You don't see a lot of these "and there is a reason for that".
Just my $.02,
Bob
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Grand HDF Member
Joined: May 2008
Posts: 4,624
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From: Newcastle, Ca.
I challenge them to a dyno run-off with virtually any build under 120ci.
Bring your best pipe to the dyno and we'll measure the peak performance, then slip on our shop beater T/H (boy is it ugly after 1000's of comparison runs over the past 10 years) and do a comparison.
Just sayin'
Bob
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