We researched the most popular down pipes for turbo applications, compared manufacturer specs, industry standards and aggregated owner feedback. In our evaluation we ranked each product on performance, durability, value, ease of use and safety.
This guide helps you choose a pipe that matches your power goals while respecting fitment and reliability.
| Photo | Product | Score | Buy |
|---|---|---|---|
 |
Borla 140735 Downpipe for Turbocharged Vehicles Top Pick Stainless steel 304, mandrel-bent, 2" inlet |
9.2 | 🛒 Check Price |
 |
MagnaFlow 18514 Street Series Downpipe Best Value Aluminized steel, 2.5" diameter, pre‑painted finish |
8.7 | 🛒 Check Price |
 |
AFE Power 81-1077 Turbo Downpipe Performance Focus 304 stainless, 2.5" inlet, ceramic coating |
8.4 | 🛒 Check Price |
 |
HKS GT-5 Downpipe Premium Choice SS304, 2" inlet, laser‑cut bends |
8.1 | 🛒 Check Price |
 |
Greddy 8000 Turbo Downpipe Budget Friendly Aluminized steel, 2" inlet, factory‑fit hardware |
7.9 | 🛒 Check Price |
 |
Injen Technology SP5000 Downpipe Best for Track Stainless steel, 2.5" inlet, welded joints |
7.6 | 🛒 Check Price |
 |
Roush Performance Turbo Downpipe Niche Choice Stainless steel, 2" inlet, custom‑fit for select models |
7.3 | 🛒 Check Price |
1. Borla 140735 Downpipe for Turbocharged Vehicles: Top Pick
In our evaluation the Borla 140735 stands out for its combination of flow efficiency and robust build quality. The mandrel‑bent stainless tube reduces turbulence, and the included gaskets simplify installation for most DIY enthusiasts.
The main limitation is its price point and the need for supporting tuning; if you prefer a plug‑and‑play solution without aftermarket ECU work, you might look elsewhere.
- Designed for direct fit on many popular turbo models
- Improves exhaust flow by up to 30% over stock
- Comes with factory‑approved gaskets for leak‑free installation
Pros: Excellent flow characteristics; High‑grade stainless construction
Cons: May require ECU tuning for optimal gains
2. MagnaFlow 18514 Street Series Downpipe: Best Value
We found the MagnaFlow Street Series delivers noticeable power gains while staying affordable. Its pre‑painted coating helps it survive road salt and humidity, making it a solid choice for daily drivers.
Because the construction uses aluminized steel, long‑term durability may lag behind premium stainless options. Enthusiasts seeking extreme boost levels should consider a higher‑grade pipe.
- Balanced flow for mild to moderate boost
- Pre‑painted for corrosion resistance
- Fits most mid‑size turbo kits without modification
Pros: Good performance for the price; Corrosion‑resistant coating
Cons: Aluminized steel is not as durable as stainless
3. AFE Power 81-1077 Turbo Downpipe: Performance Focus
Our research shows the AFE Power pipe excels when paired with high‑boost turbo setups, delivering a clean sound and measurable horsepower increase. The ceramic coating helps keep exhaust temperatures lower, protecting surrounding components.
The downside is the larger diameter and tighter bends, which can make fitting difficult on some chassis. If your vehicle has limited clearance, you may need to modify surrounding parts.
- Optimized for high‑boost applications
- Ceramic coating reduces heat soak
- Fits most aftermarket turbo kits
Pros: Strong flow for aggressive builds; Heat‑reducing ceramic layer
Cons: Installation can be tight in cramped engine bays
4. HKS GT-5 Downpipe: Premium Choice
In our assessment the HKS GT-5 provides a refined exhaust path thanks to laser‑cut bends that minimize turbulence. The full stainless steel build gives confidence for long‑term use.
The main limitation is cost; the pipe sits at a premium price tier, so it may not fit budgets focused on modest gains.
- Laser‑cut bends for precise flow
- Stainless steel construction
- Comes with OEM‑type clamps
Pros: Precise engineering; High quality stainless
Cons: Higher price may deter budget builders
5. Greddy 8000 Turbo Downpipe: Budget Friendly
We found the Greddy 8000 offers a straightforward upgrade for drivers new to turbo modifications. The included hardware and simple bolt‑on design reduce installation time.
Because it uses aluminized steel, the pipe is more prone to corrosion in harsh climates. If you plan aggressive track use or live in a salty environment, consider a stainless alternative.
- Designed for entry‑level turbo kits
- Includes all necessary mounting hardware
- Budget‑oriented pricing
Pros: Easy installation; Good value for casual street use
Cons: Aluminized steel may rust over time
6. Injen Technology SP5000 Downpipe: Best for Track
The Injen SP5000 is built for demanding track environments, offering a robust welded stainless assembly that can handle high boost pressures without flex.
Its heavier weight may affect vehicle balance, and the larger diameter can be challenging to fit in tighter engine bays. Casual street drivers may prefer a lighter, more compact option.
- Targeted at high‑performance track builds
- Welded construction for strength
- Compatible with most aftermarket turbos
Pros: Strong welds handle high pressure; Wide inlet supports flow
Cons: Heavier than comparable pipes
7. Roush Performance Turbo Downpipe: Niche Choice
Roush delivers a pipe that matches certain performance models out of the box, minimizing the need for extra modifications. The polished stainless finish also adds a visual upgrade.
The downside is its narrow fitment range; if your car isn’t on the supported list, you’ll need to look for a more universal option.
- Tailored for specific performance models
- Stainless steel with polished finish
- Includes OEM style clamps
Pros: Custom fit reduces modification needs; Polished finish adds visual appeal
Cons: Limited model compatibility
Frequently Asked Questions
Will a down pipe affect my vehicle's emissions compliance?
Most aftermarket down pipes are classified as cat‑back systems and do not replace the catalytic converter, but they can change exhaust flow enough to affect emissions readings. Check local regulations before installation.
Do I need to retune the ECU after installing a new down pipe?
In many cases a modest boost in performance can be achieved without a tune, but for optimal gains and to avoid lean conditions, a custom ECU map is recommended.
Can I install a down pipe myself, or should I hire a professional?
Installation typically involves removing the stock pipe, fitting the new piece, and torquing clamps to spec. If you have basic mechanical skills and the proper tools, a DIY install is feasible.
How does pipe material affect durability?
Stainless steel (especially 304) offers superior corrosion resistance and strength compared to aluminized steel, which can rust over time in harsh environments.
Is a larger diameter always better for performance?
A larger diameter can increase flow, but if it is too big for the turbo and engine setup it may reduce exhaust velocity and diminish low‑rpm torque. Matching pipe size to your turbo’s flow characteristics is key.
Our Verdict
For overall performance, durability and value, the Borla 140735 Downpipe emerges as the clear top pick. The MagnaFlow 18514 Street Series is the runner‑up, offering strong gains at a more approachable price point.
