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[TIMINATOR]

Has anyone seen any dyno reports or changed from the V&H 2  into 1  to or from the Thunder header? Took the Bigshots off of my 2003 Deuce and installed the V&H 2 into 1s, gained  a bunch of low end and midrange torque, and about 4 mpg! Now I added a 2003 CVO Deuce to the stable and it has the Thunder header on it. I like the looks of the V&H better, the sound of the Thunder header better. I then machined apart the V&H baffle and made it quick to remove and have made the alternate holes, slots instead, it sounds better, and runs a little better upstairs, but still sounds wimpy. The T-header is chrome and seriously blued, the V&H has the chrome heat shields. What to do? I'm not gonna kill an afternoon for a "seat of the pants" dyno run and I know I can make the V&H sound better, and buy the T-header chrome heat shields, or, or, or.....   any info or reference to any articles?   TIMINATOR

[Gnarl78]

Thunderheader makes chrome heat shields for their pipes. In general, I think the Vance and Hines chrome is better than Thunderheader. I had the black ceramic TH on my '03 Low Rider and liked the sound and power. It was loud, though.

[FLTRI]

FWIW, for you to evaluate each pipe for sound and performance both need to be individually tuned.
A Dyno tune will change both sound and performance due to the differences in flow, fuel mixture needs recalibration.
A bike that's out of tune will sound considerably different that an properly tune bike.
There can be 5-10 hp difference between pipes tuned vs out of tune.
Hope this helps,
Bob

[TIMINATOR]

I added the Dyno jet USB III to the CVO and did some preliminary tuning. Although it didn't do much for the regular Deuce except KILL the fuel mileage, until I tuned it (then it only lost 3-4 mpg), it really woke up the CVO and only slightly lowered the mileage. It mostly dropped the around town mileage by about 2-4 mpg, but the hi-way mileage remains at about 49. All in all a good deal. The non CVO with the reinstallation of the old Terry components feedback tuner lost a small amount of transient response but gained mpg, now back to 50-51 mostly hi-way. I still haven't found any dyno comparisons between the T-header and the V&H 2 into 1, nor any anecdotal evidence either. At this point, I am looking for a used chrome set of the blue proof V&H 2 into 1s and will compare them myself, and probably selling the T-header as a result. God, the T-header looks cheap, backwoods, blued, and generally chintzy (notice the quality difference of the collectors, bends, and chrome),compared to the V&H on the other Deuce next to it. I also never got a response from the Thunder Header people about my questions either. There would have to be a HUGE advantage to the T-header for me to consider keeping it, and having the inside Jet-Hot coated and the outside re-chromed for appearances. The jet-hot inside keeps the bluing to a minimum, and might even keep the T-header from melting my new, genuine, Harley $250.00 boots anymore than it has. In absence of any real feedback, I re-read this post, and I guess my mind is made up by reviewing the info that I have. TIMINATOR