A good 2 into 1 exhaust is among the most effective upgrades you can bolt onto a Harley touring bike. By merging both head pipes into a single collector and muffler, these systems build strong mid-range torque, shed weight off the right side of the bagger, and free up room for your passenger and saddlebags. The result is a Road Glide or Street Glide that pulls harder out of corners and sounds far meaner than stock.
We spent time comparing the most popular 2 into 1 systems for Twin Cam and Milwaukee-Eight touring models, looking at real dyno behavior, fitment, heat shield coverage, sound character, and how easy each one is to tune. Below are the seven systems that stood out, ranked best first, so you can match the right pipe to your riding style.
| Photo | Product | Score | Buy |
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Vance & Hines Hi-Output 2 into 1 Short Best Overall Full 2 into 1 system, megaphone collector, fits Twin Cam and M-Eight touring |
9.5 |
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Bassani Road Rage 3 2 into 1 Best Power Gains 2 into 1 megaphone, stepped headers, hand-built in the USA |
9.3 | 🛒 Check Price |
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Rinehart Racing 2 into 1 Exhaust Best Build Quality Full 2 into 1 with merged collector, premium chrome or black finish |
9.1 | 🛒 Check Price |
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S&S Cycle 2 into 1 50 State Exhaust Best Street Legal EPA-compliant 2 into 1 system for M-Eight touring, catalyst equipped |
8.9 | 🛒 Check Price |
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Two Brothers Racing 2 into 1 Comp-S Best Sound Stainless 2 into 1 with carbon fiber end cap, deep aggressive tone |
8.7 | 🛒 Check Price |
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Khrome Werks 2 into 1 Exhaust Best Value 2 into 1 megaphone system, fits Twin Cam and M-Eight touring |
8.4 | 🛒 Check Price |
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Cobra Cycle PowrFlo 2 into 1 Best for Easy Tuning 2 into 1 system with PowrPort baffle, fits touring models |
8.1 | 🛒 Check Price |
1. Vance & Hines Hi-Output 2 into 1 Short: Best Overall
The Vance & Hines Hi-Output 2 into 1 Short earns our top spot because it nails the balance most touring riders actually want. The stepped header and megaphone-style collector are tuned to build torque right where a heavy bagger needs it, so the bike feels noticeably stronger rolling from 2,500 to 4,500 rpm. On the road that translates to easier passing and far less downshifting on hills, which is exactly what you want on a loaded Street Glide.
Fitment is clean on both Twin Cam and Milwaukee-Eight touring chassis, and the heat shields cover well to keep your right leg comfortable. The honest weakness is that this is a free-flowing system, so running it without a tuner like a Fuelpak or Power Vision will leave it lean and flat. Budget for tuning and this pipe rewards you, but skip that step and you won’t hear what it can really do.
- Stepped header design tuned for strong mid-range torque
- Compact short muffler frees up saddlebag and passenger room
- Full-length heat shields with billet end cap
Pros: Excellent throttle response and bottom-end pull; Aggressive but not droning sound at cruise; Trusted brand support and tuning data
Cons: Requires a fuel tuner to run correctly; Loud enough that some riders add baffle wrap
2. Bassani Road Rage 3 2 into 1: Best Power Gains
If outright performance is your priority, the Bassani Road Rage 3 is hard to beat. The reverse-cone megaphone and carefully stepped headers produce one of the widest, strongest torque curves we have seen from a bolt-on 2 into 1 for touring bikes. It doesn’t just add a peak number, it fills in the whole midrange, so the bagger feels alive everywhere in the rev range rather than only up top.
Build quality is a standout, with clean hand welds and a choice of chrome or durable black ceramic coating. The trade-off is volume and attitude. This is a loud, unapologetic pipe, and like every system here it must be tuned to run safely. Riders who want a refined, quiet cruiser should look elsewhere, but those chasing power and presence will love it.
- Reverse-cone megaphone collector for broad power curve
- Stepped 1.75 to 1.875 inch headers
- Available in chrome or black ceramic finish
Pros: Among the strongest dyno gains in this class; Deep, full exhaust note riders consistently praise; Sturdy, hand-welded construction
Cons: On the louder end of the spectrum; Mandatory tuning to avoid running lean
3. Rinehart Racing 2 into 1 Exhaust: Best Build Quality
Rinehart has a reputation for premium finish work, and this 2 into 1 lives up to it. The merge collector is engineered for a smooth, linear pull rather than a peaky surge, which makes the bike very easy to ride hard on twisty roads. The chrome version is mirror bright and the black ceramic option holds up well against heat discoloration, both signs of the company’s attention to detail.
The sound is what many riders describe as a classic deep Harley rumble, full without the metallic rasp some systems produce. The honest downside is weight. This is a solidly built system, so you save less off the scale than with some lighter pipes, and you’ll still want a fuel tuner to dial it in. For riders who value craftsmanship and a refined note, it’s an easy recommendation.
- Merge collector design for smooth power delivery
- Heavy gauge construction with precise welds
- Deep tone without harsh high-frequency rasp
Pros: Outstanding fit and finish; Smooth, classic Harley tone; Strong mid-range without excessive harshness
Cons: Heavier than some competing systems; Needs a tuner for best results
4. S&S Cycle 2 into 1 50 State Exhaust: Best Street Legal
For riders who need to stay on the right side of emissions laws, the S&S Cycle 2 into 1 50 State system is the smart pick. It’s one of the few high-performance 2 into 1 designs that includes a catalyst and remains 50-state legal, yet still delivers a genuine torque bump over the stock head pipe and muffler. S&S engineered it so the converter doesn’t choke the gains, which is no small feat.
The styling is clean and the heat shields cover thoroughly, so it looks and feels like a quality factory-plus upgrade. The compromise is exactly what you’d expect: the sound is a bit more civilized than wide-open race systems, and the catalyst adds a little weight. If legality matters in your area, those trade-offs are well worth it for a pipe that performs and keeps you compliant.
- 50-state legal with integrated catalyst
- Tuned for strong torque while staying emissions compliant
- Full heat shield coverage with clean styling
Pros: Street legal in all states including emissions areas; Real performance gains despite the catalyst; Backed by S&S engineering and support
Cons: Slightly more reserved sound than open systems; Catalyst adds some weight
5. Two Brothers Racing 2 into 1 Comp-S: Best Sound
The Two Brothers Comp-S has built a loyal following on the strength of its sound. The full stainless system with a carbon fiber end cap produces a deep, chest-thumping note that stands out in a crowded parking lot, and it backs that voice with respectable mid-range gains. The stainless construction also keeps weight down and shrugs off corrosion better than many chrome systems.
Styling is a strong point, with the carbon end cap giving the bagger a modern, purposeful look. The honest drawbacks are practical: heat shield coverage can be sparse depending on the exact fitment, so heat management on hot days takes some attention, and the volume that makes it so fun around town can wear on you across an all-day interstate run. For sound-focused riders, though, this is a favorite.
- Full stainless steel construction resists corrosion
- Carbon fiber end cap for a modern look
- Deep, throaty exhaust note that turns heads
Pros: Distinctive deep tone many riders rank as the best; Lightweight stainless build; Eye-catching carbon end cap styling
Cons: Limited heat shield coverage on some fitments; Loud enough to fatigue on very long rides
6. Khrome Werks 2 into 1 Exhaust: Best Value
Khrome Werks offers a 2 into 1 that delivers most of what riders want from this style without demanding the premium of the marquee brands. The megaphone collector is tuned for real-world street torque, so the bike pulls cleanly through the midrange where you spend most of your time. Installation is straightforward and well documented, making it a friendly choice for riders doing the work in their own garage.
Where it gives a little ground is in the fine details. The chrome finish is good but not quite as deep as the very best systems here, and like every performance pipe it needs a tuner to run properly. None of that undermines the core value, which is a strong-performing, easy-to-fit 2 into 1 that gives up surprisingly little to pricier rivals.
- Megaphone collector tuned for usable street torque
- Solid chrome finish at an accessible point in the lineup
- Straightforward bolt-on installation
Pros: Strong performance for the money; Easy, well-documented install; Good torque gains for everyday riding
Cons: Finish is good but not quite top-tier; Still requires fuel tuning
7. Cobra Cycle PowrFlo 2 into 1: Best for Easy Tuning
The Cobra PowrFlo 2 into 1 is built around real-world rideability rather than chasing the biggest dyno number. Its collector geometry produces a smooth, forgiving torque curve that’s among the easiest in this group to get running right, which is a real advantage if you’re new to tuning or want to minimize trips to the dyno. Heat shield coverage is generous, so it stays comfortable on long days in the saddle.
The sound sits in a balanced middle ground, more refined than the loudest systems here, which some riders will love and others will find tame. Its measured peak gains also trail the Bassani and Vance & Hines systems, and the styling is understated rather than flashy. If your priority is a fuss-free, comfortable, well-mannered 2 into 1, though, the PowrFlo is a sensible choice.
- PowrFlo collector design for smooth torque delivery
- Forgiving fuel curve that’s easy to dial in
- Full heat shield coverage for rider comfort
Pros: Among the easier systems to tune; Comfortable, well-covered heat shields; Balanced sound that isn’t overly loud
Cons: Peak gains trail the top performers; Styling is more understated than rivals
Frequently Asked Questions
Do I need a fuel tuner with a 2 into 1 exhaust on my Harley touring bike?
Yes, in nearly every case you should plan on a fuel tuner. A free-flowing 2 into 1 lets the engine breathe far better than stock, and the factory fuel map can’t compensate for that on its own. Running an aftermarket exhaust without retuning leaves the engine lean, which causes excessive heat, popping on deceleration, and lost power. A device like a Fuelpak FP3, Power Vision, or a dyno tune restores the correct air-fuel ratio and unlocks the gains the pipe is designed to deliver. Treat the tuner as part of the exhaust purchase, not an optional extra.
Why choose a 2 into 1 over a 2 into 2 dual exhaust for a bagger?
A 2 into 1 merges both cylinders into a single collector, which scavenges exhaust pulses more efficiently and typically builds stronger, broader mid-range torque, exactly the kind of pull a heavy touring bike benefits from. It also weighs less than most dual systems and removes a pipe from the right side, freeing space and reducing heat near your leg. A 2 into 2 setup keeps the traditional dual-pipe look and a symmetrical sound that some riders prefer. If your goal is performance and weight savings, the 2 into 1 usually wins; if classic styling matters most, duals still appeal.
Will a 2 into 1 exhaust fit both Twin Cam and Milwaukee-Eight touring models?
Many manufacturers offer the same model family for both engine platforms, but the specific part number differs between Twin Cam and Milwaukee-Eight bikes because the head pipe routing and mounting points changed. Always confirm the system is listed for your exact year and engine before buying. The good news is that most of the pipes in this guide are available in versions for both platforms, so you can get the design you want as long as you order the correct fitment for your model.
Are these 2 into 1 exhaust systems too loud for daily riding?
Volume varies a lot between systems. Performance-focused pipes like the Bassani Road Rage 3 and Two Brothers Comp-S are genuinely loud and can become tiring on long highway days, while options like the Cobra PowrFlo and the S&S 50 State system are more restrained. If you ride long distances or care about neighbors and noise rules, lean toward the quieter systems or add quiet baffles where the manufacturer offers them. Keep in mind that very loud open systems may also run afoul of local sound ordinances, so check your area’s rules.
How much horsepower and torque will a 2 into 1 exhaust add?
On its own, a good 2 into 1 paired with a proper tune commonly adds several foot-pounds of torque across the midrange and a handful of horsepower, with the biggest real-world benefit being improved throttle response and roll-on power rather than a huge peak number. The gains grow significantly when the exhaust is combined with a high-flow air intake and a tune as a complete stage upgrade. Exact figures depend on your engine, displacement, and supporting modifications, so view the exhaust as one strong piece of a larger performance package.
Our Verdict
For most Harley touring riders, the Vance & Hines Hi-Output 2 into 1 Short is our top pick, combining excellent mid-range torque, clean fitment on both Twin Cam and Milwaukee-Eight baggers, and strong tuning support in one well-rounded package. If you’re chasing the biggest possible power gains and a deeper, louder voice, the Bassani Road Rage 3 is the runner up and arguably the strongest performer here, provided you don’t mind the extra volume. Whichever you choose, pair it with a proper fuel tune to get the full benefit.
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