Duals with or without cross over

I am looking to change out the stock header system on my '08 Ultra. My question is has anyone an opinion on duals with a cross over or with out a cross over. I am looking at a couple different brands and they offer them both ways. So what do you all think ?

with the crossover you might not lose as much low end as you are still getting some scavenging with the crossover and with the crossover they are trickier to take apart if you are working on the engine for example(another junction to take apart) other than that it is personal preference. Todd

Go with the exhaust you like, all the different tech sites that I visit on the net have always suggested that you loose something with true duals.

Well to post my actual experience, 2005 bagger with a Darkhorse crank 103, running SE cleaned up performance heads, S&S G carb, DTT ignition custom map running Head Quarters 33G cams.

With V&H Pro pipe vs V&H true duals lost 3 hp at 6500 rpm with the duals but gained 7 TQ at 3K. Running the duals with hooker adjustable slipons.

Performance builds will respond differently, but unless you ride your bike on the dyno you are not gonna feel or see it.

I love the duals, sound is excellent & they belong on a bagger.

JMO,
Cracker

The best overall performance in the usual usable power range is achieved with 2-1 pipes (run V&H Pro Pipes myself after trying other duals on my 'King). Everything else is either for racing or looks. So go with what you ride for.

:cheers:

Yep the interesting part of this is you loose HP. The Hp I lost was at the rev limit, how often do we ride there? Tq is what I gained & an amount that you can feel at 2K rpm. It's something I can adjust with my Hooker adjustable slip ons, close em I gain low end Tq plus slightly reduce the volume, open & gain noise but loose a little bottom end Tq. On my big bagger I choose the reduced volume & bottom end, but the nice part is the sound, sweet music to my ears with em open or closed off some...if I want to win the Hp dyno shoot out open em up wide, but me me I prefer to have em pinched off at 25% open on each.

Sound & looks is very subjective, I liked my 2 in 1 but not nearly as much as I do the true duals, but that's just my opinion.

Enjoy & keep the rubber side down,
Cracker

I have an 02' Heritage Classic with a carb. Stock is 58 hp and 70 torque at rear wheel. I have the SE breather, Andrews 26G gear driven cams and V&H true duals, (no crossover) with V&H shark tail slipon mufflers. Tuned the carb myself using the old plug chop method. Went one size up on the pilot jet. Took it to school and had it dynoed. A/F mix is at 13.4-13.7 throughout the entire rpm band. Running 67 hp and 85 torque at rear wheel.

If you want to go for the nostalgic look,and good perfomance and sound.I'm running these on my Heritage, with the fishtail end caps.
SuperTrapp: Performance Exhaust

I have not picked up a set yet. I finally found the part number for just the header pipes from Rhinehart , so that will end a winter project .

True Duels

I run Vance Hines header pipes on my FLHT with slip on long Porker straight pipes with steel baffels that use stock mount locations. Sounds so nice. The Vance Hines fit perfect, they also come with rear mount bracket that bolts to starter for support on the back header pipe. Important. The heat shields also perfect fit, good quaility all round. With the other mods, Andrews EV27 Cam, Carb reworked top to bottom, Accel Ignition system, Super single fire coil, plugs, wires, Programable Ignition Module. It runs strong from 2000 to 6000, pulls hard. My FLHT is a 1997 and the stock header split open at y joint on rear exhaust. Oh yea, I run a Arlen Ness preformance Breather also. Have not dyno'ed but seat of the pants easy 20 to 25 hp gain over stock. Wife rides 1998 Dyna Low Rider, I ride solo so wieght is not big issue with Cam I picked. Nothing sweeter than a Big Twin Idling bout 1000 rpm with good duel exhaust system. Or that straight pipe rap about 5500 rpm with true duels. Unless your drag racing for money forget the 2 into one issue. With the duel header pipe setup, you have many choices of slip on mufflers to pick from. Even reuse stock if you want.