Upgrading your Honda Civic’s exhaust can enhance sound, reduce weight, and improve performance. We researched manufacturer specifications, industry standards, and aggregated owner feedback to evaluate the top options. This guide compares seven exhaust systems across performance, durability, value, ease of installation, and safety.
| Photo | Product | Score | Buy |
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Injen SP1695 Cat-Back Exhaust Best Overall Cat-back, 3-inch mandrel-bent tubing, T304 stainless steel |
9.0 |
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MagnaFlow 19306 Exhaust System Best Value Cat-back, 2.5-inch tubing, stainless steel, polished tip |
8.7 | 🛒 Check Price |
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A'PEXi WS2 Cat-Back Exhaust Best Sound Quality Cat-back, 2.5-inch piping, dual-wall tips, stainless steel |
8.4 | 🛒 Check Price |
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Borla 140500 Cat-Back Exhaust Top Performance Cat-back, 2.5-inch mandrel-bent, T304 stainless, dual tips |
8.1 | 🛒 Check Price |
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Megan Racing Cat-Back Exhaust Budget Pick Cat-back, 2.5-inch piping, polished stainless steel tip |
7.8 | 🛒 Check Price |
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GReddy Supreme SP Cat-Back Exhaust Premium Choice Cat-back, 2.75-inch piping, dual tips, stainless steel |
7.5 | 🛒 Check Price |
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Skunk2 Alpha Series Cat-Back Exhaust Track Ready Cat-back, 3-inch mandrel-bent, stainless steel, single tip |
7.3 | 🛒 Check Price |
1. Injen SP1695 Cat-Back Exhaust: Best Overall
The Injen SP1695 cat-back exhaust impressed us with its deep, refined tone and noticeable throttle response gains. Based on owner feedback and the spec sheets, the 3-inch mandrel-bent tubing reduces restriction while keeping drone minimal on the highway. The T304 stainless steel ensures long-term durability even in harsh climates.
However, this system isn’t CARB compliant, so buyers in California should skip it. Also, the price is higher than many competitors, making it less ideal for budget-conscious shoppers. If you want premium materials and a mature sound, this is a top choice.
- Deep, aggressive tone without drone on highway
- Full T304 stainless steel construction resists corrosion
- Direct fit with included hardware for DIY installation
Pros: Excellent build quality; Great sound balance; Easy installation
Cons: Higher price point; Not CARB compliant for some states
2. MagnaFlow 19306 Exhaust System: Best Value
The MagnaFlow 19306 offers excellent value with its lifetime warranty and quality stainless steel construction. In our evaluation, it provides a smooth, deep sound that enhances the driving experience without being obtrusive. Owner feedback highlights the easy installation and perfect fitment on most Civic models.
Still, those seeking an aggressive, race-inspired exhaust note may find it too tame. It also uses 2.5-inch tubing, which is slightly smaller than some aftermarket systems, but still delivers solid performance gains. If you want a reliable, warrantied upgrade without breaking the bank, this is a strong contender.
- Smooth, deep tone with no drone at cruising speeds
- Lifetime warranty on materials and workmanship
- Polished stainless steel tip adds a clean look
Pros: Affordable price; Lifetime warranty; Easy bolt-on installation
Cons: Slightly quieter than some competitors; Not the loudest option for aggressive tuners
3. A'PEXi WS2 Cat-Back Exhaust: Best Sound Quality
The A’PEXi WS2 is known for its refined, deep exhaust note that avoids the raspiness of cheaper systems. Based on owner feedback and specifications, it uses a unique straight-through design that improves flow while keeping noise levels civil. The dual-wall tips give a high-end appearance that complements the Civic’s rear bumper.
However, for those wanting a loud, aggressive exhaust, the WS2 may be too reserved. It also sits at a higher price point relative to the modest horsepower gains. If sound quality and daily comfort are your priorities, this is an excellent pick.
- Deep, sporty tone with minimal interior resonance
- Dual-wall polished tips for a premium look
- Includes all necessary gaskets and hardware
Pros: Excellent sound refinement; Good fit and finish; Reduces backpressure
Cons: Not as loud as some competitors; Can be pricey for the performance gain
4. Borla 140500 Cat-Back Exhaust: Top Performance
The Borla 140500 is designed for enthusiasts who prioritize performance and a loud exhaust note. In our research, it delivers noticeable horsepower and torque gains, especially in the mid-range. The million-mile warranty underscores its durability, and the dual tips give a muscular look.
However, the aggressive sound can be fatiguing on long drives, and some owners report drone at highway speeds. It also commands a premium price. If you’re building a track-focused Civic or simply want the loudest option, this is a top performer. Otherwise, consider a quieter alternative.
- Aggressive, race-inspired sound with crackles on downshifts
- Aircraft-grade T304 stainless steel for maximum durability
- Million-mile warranty covers materials and workmanship
Pros: Excellent performance gains; Loud, aggressive tone; High-quality materials
Cons: Very loud, may cause drone; Higher price; Not ideal for daily commuting
5. Megan Racing Cat-Back Exhaust: Budget Pick
The Megan Racing cat-back exhaust is a budget-friendly option that still provides a noticeable sound upgrade. Owner feedback indicates a deep tone that’s louder than stock but not overwhelming. The polished tip adds a visual upgrade without extra cost.
However, some users report fitment issues, requiring adjustments or additional clamps. The build quality isn’t as solid as premium brands, and the sound can be slightly raspy at high RPMs. If you’re on a tight budget and willing to deal with potential tweaks, this is a decent entry-level system. Otherwise, invest in a higher-quality option.
- Affordable price point for a full cat-back system
- Deep tone with moderate volume
- Simple bolt-on installation with included hardware
Pros: Very budget-friendly; Decent sound improvement; Easy to install
Cons: Fitment issues reported on some models; Less refined sound; Limited warranty
6. GReddy Supreme SP Cat-Back Exhaust: Premium Choice
The GReddy Supreme SP stands out with its distinctive dual-tip design and deep exhaust note. In our evaluation, it offers a refined sound that turns heads without excessive drone. The included silencer allows you to tone it down when needed.
However, the high price and occasional fitment challenges make it a niche choice. Some owners report needing to modify hangers for a perfect fit. It’s best for Civic enthusiasts who want a unique look and are willing to pay a premium. For most buyers, the value proposition is low compared to similarly priced competitors.
- Unique dual-tip design with angled cutouts
- Deep, exotic sound with minimal drone
- Includes a silencer for noise control
Pros: Distinctive styling; Good sound quality; Includes silencer
Cons: Very expensive; Fitment can be tricky; Not widely available
7. Skunk2 Alpha Series Cat-Back Exhaust: Track Ready
The Skunk2 Alpha Series is built for track enthusiasts who want maximum performance. The 3-inch piping offers the least restriction, resulting in notable horsepower gains at high RPMs. The single tip design is functional and lightweight.
However, this system is brutally loud and drones heavily, making it unsuitable for daily commutes. Fitment can be hit-or-miss, with some owners needing to adjust hangers. It also lacks a silencer. If you only drive your Civic on the track, this is a solid choice. For street use, we recommend looking elsewhere.
- Maximum flow for track use with 3-inch piping
- Loud, aggressive exhaust note
- Lightweight construction reduces overall weight
Pros: Excellent performance for racing; Very loud; Weight savings
Cons: Extremely loud for daily driving; Drone is significant; Fitment issues reported
Frequently Asked Questions
Will an aftermarket exhaust void my Honda Civic warranty?
An aftermarket exhaust itself doesn’t void your warranty, but if it causes damage to other components, those repairs may not be covered. We recommend keeping your stock parts and consulting your dealer if you have concerns.
What size exhaust tubing is best for a Honda Civic?
For most naturally aspirated Civics, 2.5-inch tubing is optimal for street use, balancing flow and torque. For turbocharged or track builds, 3-inch tubing may be beneficial but can hurt low-end torque on stock engines.
How difficult is it to install a cat-back exhaust myself?
Cat-back installations are generally straightforward with basic hand tools. Most systems bolt directly to the stock hangers. Based on owner feedback, expect 1-2 hours for a first-time install. Professional installation is recommended if you lack experience.
Do I need a tune after installing a cat-back exhaust?
No, a cat-back exhaust doesn’t require a tune as it doesn’t alter the engine’s air-fuel ratio. However, a tune can maximize performance gains from the improved flow. For most daily drivers, the stock ECU adapts fine.
What is the difference between cat-back and axle-back exhaust?
A cat-back system replaces the exhaust from the catalytic converter back, including the muffler and piping. An axle-back only replaces the muffler and tips behind the rear axle. Cat-back offers more performance gains, while axle-back is cheaper and easier to install.
Our Verdict
After researching and comparing, the Injen SP1695 Cat-Back Exhaust is our top pick for its excellent build quality, balanced sound, and noticeable performance gains. For those on a budget, the MagnaFlow 19306 offers great value with a lifetime warranty. Choose based on your priorities for sound, performance, and cost.
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