Best 2 into 1 Exhause
Outstanding HDF Member
Joined: Feb 2009
Posts: 2,005
Likes: 53
From: ID Ho
If those are your 2 choices, then theThunderHeader would make more power for you!
Ultimate HDF Member
Joined: Aug 2008
Posts: 5,413
Likes: 17
From: eastern oklahoma
after much study on the 2 into 1's, i chose the vance & hines 2 into 1 pro pipe, for a few reasons. quality of the welds, quality of the chrome plating, price, and sound. but the main reason i wanted the 2 into 1 was for the increased torque, which this newer designed pipe delivers in spades. after considering the fatcat, thunderheader, and v&h, the v&h won the contest for me. the new design has very long primary tubes, promoting great low rpm torque, but it does not sacrifice power anywhere throughout the band. i do not like the tomato can welded on to the back of the muffler like the thunderheader, and it's a bit loud for my tastes. the fatcat, was my first thought when i considered a 2 into 1, but after visiting with the tuner and service manager on this issue, we all three agreed that the vance & hines pro pipe was the right choice. the fit and finish are great. to do it again, this is the pipe i'd use, the pro pipe 2 into 1.
Road Master
Joined: May 2008
Posts: 900
Likes: 4
From: Wisconsin
Best performing (on the dyno) 2-1:
1: Road Rage
2: Fat Cat/Boss
3: Pro Pie HO
4: ThunderHeader
5: Rb LSR
Best fit/finish, looking:
1: Fat Cat/Boss
2: everything else
Best sound:
1: Boss w/performance baffle
2: Road Rage
3: ThunderHeader
Lowest performance (again on the dyno) these pipes just dont make the numbers they should:
Rinehart
Big Radius
Caliber
Pro Pipe
1: Road Rage
2: Fat Cat/Boss
3: Pro Pie HO
4: ThunderHeader
5: Rb LSR
Best fit/finish, looking:
1: Fat Cat/Boss
2: everything else
Best sound:
1: Boss w/performance baffle
2: Road Rage
3: ThunderHeader
Lowest performance (again on the dyno) these pipes just dont make the numbers they should:
Rinehart
Big Radius
Caliber
Pro Pipe
I have tried all of these and I disagree............it depends on your build............The fatcat is second to the RB LSR........
Mine made more torque and HP with a LSR than any other pipe on the market.....hands down!!!
Tourer
Joined: Feb 2009
Posts: 433
Likes: 1
From: Texas
On my 2009 Road Glide I've got the 2" black ceramic RB LSR 2-1 which they matched up to my S&S build of 106" Big Bore kit, 570G cams and 89cc ported & polished heads.
I absolutely love the performance and sound without it being too loud.
Have not yet gotten around to dyno it but the entire set up performs beyond what I had expected. The bike runs like a "scalded dog" and not sure if I could be any happier without going really bigger.
Good luck in your decision.
I absolutely love the performance and sound without it being too loud.
Have not yet gotten around to dyno it but the entire set up performs beyond what I had expected. The bike runs like a "scalded dog" and not sure if I could be any happier without going really bigger.
Good luck in your decision.
Road Master
Joined: Sep 2006
Posts: 1,062
Likes: 4
From: Arizona
FatCat is a very nice pipe. Excellent build quality an fit & finish. You cant go wrong with D&D.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Tourer
Joined: Dec 2007
Posts: 309
Likes: 0
From: PNW
Don't overlook the Supertrapp. It's fairly quiet, at least in relation to some of the others mentioned here, and makes good low to mid range power. You can fine tune the pipe for torque or hp as well. I'm very happy with mine.