If you’re upgrading to a four-into-one aesthetic or seeking improved exhaust flow, these universal 38-51mm slip-on exhausts are designed for dirt bikes, street bikes, scooters, ATVs, and more. The top picks below fit most 38-51mm pipes, offer different sound styles, and provide installation flexibility for riders and builders. This guide highlights buyers suited for street performance, off-road versatility, or a sleek, loud note for show bikes. Summary:
| Product | Brand | Inlet Diameter | Best For |
|---|---|---|---|
| Universal 1.5-2″ Inlet Hexagon Exhaust Muffler Pipe Slip On Scooter Motorcycle ATV Dirt Street Bike | Fast Pro | 38-51mm | Budget build, universal fit, all-terrain use |
| PACEWALKER Motorcycle Slip On Muffler, 1.5-2″ Universal Exhaust | PACEWALKER | 38-51mm | Street/Sport motorcycles, removable DB killer |
| PACEWALKER Motorcycle Exhaust Tips 1.5-2″ Inlet | PACEWALKER | 38-51mm | Dual-outlet light-weight option, top-end performance |
| POSENG 1.5-2″ Inlet Motorcycle Exhaust Muffler Slip On 400mm | POSENG | 38-51mm | DB killer removable, titanium alloy build |
| Tesmirror Motorcycle Exhaust Muffler, Titanium, 1.5-2″ Inlet | Tesmirror | 38-51mm | Lightweight slip-on with removable DB killer |
Universal 1.5-2″ Inlet Hexagon Exhaust Muffler
Best for riders seeking a highly universal, budget-friendly slip-on that fits a broad range of bikes with 38-51mm pipes. It is listed as a universal muffler that can be used on dirt bikes, street bikes, scooters, ATVs, and quads. The package includes the muffler and hardware, with installation instructions sold separately. Best for: builders on a tight budget or riders needing quick compatibility across multiple machines.
Limitations: No installation instructions are included in the package, so some assembly knowledge is required. Consider compatibility with your bike’s downstream exhaust system before purchase.
PACEWALKER Slip On Muffler With DB Killer
Best for street and sport motorcycles that want a balance of sound control and performance. This muffler uses a stainless steel sleeve with stainless connectors and a detachable silencer for multiple sound profiles. The plating finish adds rust resistance and a brighter look. It fits 38-51mm pipes and supports diverse models, including scooters. Best for: riders who want a removable DB killer option and an attractive, durable finish.
Limitation: The product description emphasizes universal fit but does not detail exact model compatibility; verify your bike’s pipe diameter and mounting style before ordering.
PACEWALKER Exhaust Tips 1.5-2″ Inlet
Best for riders seeking a dual-outlet design that reduces overall weight while maintaining strong exhaust flow. The muffler is a universal slip-on for 38-51mm exhaust pipes, with a 368mm overall length and a dual-outlet configuration. This helps with aggressive sound and weight reduction, which can benefit top-end performance. Best for: sport-oriented builds or riders wanting a lighter slip-on with a strong presence.
Caution: Dual-outlet design can alter exhaust note; ensure legality in your riding region if noise limits apply.
POSENG 1.5-2″ Inlet Slip On With DB Killer
Best for riders who want 38-51mm compatibility with a removable DB killer for louder or deeper tones. The titanium alloy exterior and stainless steel components promise corrosion resistance. The 400mm length provides a substantial exhaust tip for a balanced look on various bikes. Best for: riders who value durability and customizable sound levels.
Limitation: The description mentions titanium alloy and stainless steel but does not specify exact weight or mounting hardware details; confirm compatibility with your bike’s mounting points.
Tesmirror Titanium Slip-On Exhaust
Best for riders seeking a lightweight titanium-aluminum combo with a removable DB killer and 51mm connection. The 365mm overall length provides a compact silhouette for many sport and street bikes with 38-51mm pipes. Best for: riders prioritizing weight saving and a high-end aesthetic with a modulated exhaust note.
Limitation: Aluminum body with stainless connector may require careful installation to avoid overtightening; check your exhaust alignment and clearance.
Buying Guide
Key considerations when choosing a universal slip-on exhaust for 38-51mm pipes:
- Inlet compatibility: Confirm your bike’s exhaust diameter is 38-51mm and verify the mounting hardware aligns with your frame or subframe mounting points.
- Sound control: Decide whether you need a removable DB killer for sound customization and local regulations compliance.
- Material durability: Stainless steel and titanium alloys offer corrosion resistance and weight savings; balance with cost.
- Weight and performance: Lighter slip-ons can improve throttle response and handling, especially on smaller bikes or race-inspired builds.
- Appearance and finish: Plating, coatings, and color options impact the overall look of your bike and can affect durability in certain climates.
- Installation requirements: Some products include hardware while others do not; consider whether you have the tools and space for installation.
- Legal and noise considerations: Some regions restrict exhaust noise levels; choose a setup that complies with local laws if riding publicly.
Frequently Asked Questions
- What is the typical pipe diameter these universal exhaust slip-ons fit? Answer: Most fit 38-51mm pipes, designed to accommodate a wide range of bikes.
- Do these slip-ons require professional installation? Answer: Some kits include hardware and can be installed with common workshop tools; others may require intermediate mechanical skill.
- Can I remove the DB killer for a louder tone? Answer: Yes, several models include a detachable DB killer for variable sound levels.
- Will a universal slip-on improve performance? Answer: Benefits vary; some riders experience lighter weight or marginal power delivery improvements due to reduced exhaust backpressure on certain setups.
- Are these exhausts compatible with all dirt bikes and scooters? Answer: They are designed for a wide range but always verify model-specific clearance and mounting hardware before purchasing.
- What maintenance should I expect with stainless steel or titanium exhausts? Answer: Regular cleaning to remove road grime and check for rust spots or loose clamps helps maintain performance and appearance.