The Acura Integra remains a standout platform in the sport compact world, praised for its nimble handling and highly tunable B-series engines. For owners seeking a meaningful power gain without breaking the bank, upgrading the exhaust headers is one of the most cost-effective bolt-on modifications. A quality set of performance headers can unlock 10–15 horsepower at the wheels — a noticeable improvement in a car that weighs around 2,500 pounds. This guide examines the best header options for the Acura Integra, focusing on brands that deliver proven results for roughly $600 or less. We'll also cover installation tips, supporting modifications, and what to look for when choosing a header for your specific year and engine.

Why Upgrade to Performance Headers?

Factory exhaust manifolds on the Acura Integra are designed for low cost, noise reduction, and clearance — not performance. They typically use cast iron or thin-walled steel with restrictive bends and small-diameter runners. A performance header replaces this with smoothly mandrel-bent tubing that merges each exhaust pulse with minimal backpressure. The result is a significant improvement in exhaust scavenging, which helps the engine breathe more freely at higher RPMs.

The measurable benefits include:

  • Horsepower gains of 10–15 hp at the wheels on a stock or lightly modified engine
  • Improved throttle response and a wider powerband
  • Up to 8–10 lb-ft of torque gain in the mid-range
  • A more aggressive exhaust note, especially when paired with a cat-back system
  • Reduced engine bay temperatures compared to a cast iron manifold

These gains are consistent across the popular B18A, B18B, and B18C engines found in 1990–2001 Integra models, as well as the B17 in the 1992–1993 GS-R. Headers designed for the B-series platform are also often interchangeable between the Integra and certain Civic Si models.

Key Considerations Before Buying Headers

Not all headers are created equal. Before selecting a set for your Integra, evaluate these factors to ensure you get the right part for your goals and budget.

Material and Construction

  • Mild steel (painted or coated): Affordable, but prone to rust. A ceramic coating helps with heat retention and corrosion resistance.
  • 304 stainless steel: Corrosion-resistant, durable, and holds up well under high heat. Most performance headers in the $400–$600 range use this material.
  • 401 stainless / T409: Less expensive than 304, but still rust-resistant. Often used in budget headers.

Primary Tube Diameter

For a naturally aspirated B-series engine, 4-2-1 headers with 1.5-inch or 1.625-inch (1-5/8”) primary tubes are ideal for street and mild track use. Larger 1.75-inch primaries are better suited to high-horsepower builds (over 200 whp). Going too large on a stock engine will hurt low-end torque.

Collector Design

A smooth, properly merged collector helps maintain exhaust velocity. Look for headers with a merge collector (often a 2.25-inch or 2.5-inch collector outlet) that transitions smoothly to the rest of the exhaust system.

O2 Sensor and Emissions Compliance

Most Integra headers include an O2 sensor bung in the collector. If you live in a region with emissions testing, ensure the header is CARB-compliant (has an Executive Order number) or that you can retain the factory catalytic converter. Many aftermarket headers relocate the catalytic converter further downstream or require a test pipe — check local laws.

ECU Tuning Requirement

While a header alone can be run on a factory ECU, the engine computer may not take full advantage of the improved flow. A tune (via a chip, Hondata, or standalone ECU) will optimize the air/fuel ratio and ignition timing, maximizing gains and preventing a lean condition at high RPM.

Top Performance Headers for Acura Integra (Under $600)

These four brands have earned strong reputations in the Honda/Acura community for delivering reliable power gains, good fitment, and solid construction — all at or near the $600 price point.

1. DC Sports Headers

DC Sports is arguably the most recognized name in Integra header upgrades. Their DC Sports 4-2-1 Ceramic Header (Part #B-Series Specific) has been a staple for decades. Constructed from 16-gauge 304 stainless steel with a polished finish or optional ceramic coating, these headers feature mandrel-bent 1.5-inch primary tubes and a 2.25-inch collector.

  • Dyno-proven gains: 10–12 hp and 8 lb-ft torque on a stock B18C1 (GS-R)
  • Includes all necessary gaskets and hardware
  • Available in chrome or ceramic-coated versions
  • Direct bolt-on with no modification required
  • Price: ~$350–$450 (chrome) / ~$550–$600 (ceramic)

DC Sports also offers a stainless steel 4-1 race header for hardcore track use, but it sacrifices low-end torque and is louder. The 4-2-1 is the better street choice.

2. Skunk2 Racing Alpha Series Header

Skunk2 Racing is synonymous with serious horsepower. Their Alpha Series Header is engineered for maximum flow using a merge collector design and 1.75-inch primary tubes. It's built from 304 stainless steel and features a beautiful polished finish. The header uses a 3-bolt collector flange that mates to a 2.5-inch exhaust system.

  • Dyno-proven gains: 14–16 hp and 10 lb-ft torque on a tuned GS-R (requires ECU tune)
  • Merge collector reduces turbulence
  • 10-gauge flanges prevent warping
  • O2 sensor bung included
  • Price: ~$580–$650 (often found on sale under $600)

Skunk2 headers are designed for enthusiasts who plan supporting mods (intake, exhaust, camshafts). They may require slight modification of the lower radiator hose on some Integras — verify fitment before installation.

3. Megan Racing Headers

Megan Racing offers excellent value without sacrificing quality. Their Megan Racing Stainless Steel 4-2-1 Header for the Acura Integra B-series is a direct-fit piece using T304 stainless steel, 1.5-inch primaries, and a 2.25-inch collector. It's a popular choice for budget-conscious DIYers.

  • Dyno-proven gains: 10–12 hp on a stock Integra LS (B18B)
  • Straightforward bolt-on with included gaskets
  • Polished stainless steel
  • O2 sensor bung located in the collector
  • Price: ~$300–$400

Megan Racing headers are among the most affordable quality options. They fit both DOHC VTEC and non-VTEC B-series engines with the same mounting points.

4. PLM (Performance Likely Maximum) Headers

PLM has gained traction in the Honda community for offering big-tube 4-1 race headers at a bargain price. Their PLM 4-1 Race Header uses 1.75-inch primaries and a 3-inch collector. It's made from 304 stainless steel with a smooth finish. While not ideal for daily driving due to loudness and low-end torque loss, it's a great option for track cars or turbo projects.

  • Gains heavily dependent on supporting mods; can add 12+ hp with proper tuning
  • Full 3-inch collector for maximum top-end flow
  • Includes a flex pipe and O2 bung
  • Price: ~$250–$350

Be aware that PLM headers require a 2.5-inch or 3-inch exhaust system to realize their potential. Fitment may need minor adjustments on some chassis.

Installation Guide for Acura Integra Headers

Installing headers on a 1990–2001 Integra is a weekend job for someone with moderate mechanical skills. Plan for 3–5 hours. Here is a step-by-step overview.

Tools and Parts Needed

  • Socket set (10mm, 12mm, 14mm, 17mm)
  • Wrench set (12mm, 14mm, 17mm)
  • Breaker bar with a long extension
  • PB Blaster or penetrating oil
  • New exhaust manifold gasket (OEM or aftermarket)
  • New header-to-cat gasket (if applicable)
  • Anti-seize compound for bolts
  • Jack and jack stands (or ramps)

Step-by-Step Process

  1. Disconnect the battery (negative terminal). Allow the engine to cool completely.
  2. Raise the car securely on jack stands. Remove the splash shield if equipped.
  3. Spray penetrating oil on all exhaust manifold nuts and O2 sensor threads. Let it soak for 15 minutes.
  4. Disconnect the O2 sensor wiring and remove the sensor from the factory manifold.
  5. Remove the heat shield bolts and the heat shield itself.
  6. Working from underneath, unbolt the manifold-to-downpipe (or manifold-to-cat) nuts. A 14mm swivel socket helps.
  7. Remove the 10mm nuts holding the manifold to the cylinder head. There are 6–8 nuts depending on the engine.
  8. Carefully pull the factory manifold out from the top or bottom (you may need to rotate it).
  9. Clean the cylinder head mating surface with a scraper. Do not gouge the aluminum.
  10. Install the new gasket (copper or OEM style). Apply a dab of anti-seize to the studs.
  11. Place the new header in position. Start all nuts by hand, then torque to 23–27 lb-ft (follow the manufacturer's spec). Torque in a cross pattern.
  12. Reattach the header to the exhaust system. You may need a flex pipe adapter or a new cat section if the outlet diameter changed.
  13. Reinstall the O2 sensor into the new header bung. Use anti-seize on the threads.
  14. Double-check all bolts, reconnect the battery, and start the engine. Check for exhaust leaks at the manifold and collector connections.
  15. After a few heat cycles, re-torque the header-to-head nuts.

Pro tip: Many aftermarket headers require a slight notch in the lower radiator hose bracket for clearance. Check fitment before final tightening.

Supporting Mods and Tuning

A header alone will wake up your Integra, but to maximize the investment, consider these companion upgrades:

  • High-flow catalytic converter or test pipe: A restrictive stock cat cancels out some flow gains. A high-flow cat (like MagnaFlow or Random Technology) is emissions-friendly.
  • Cat-back exhaust: A 2.25-inch or 2.5-inch exhaust system (e.g., from Yonaka, HKS, or Apex'i) reduces backpressure further.
  • Cold-air intake: A CAI (from AEM or Injen) complements the header by improving intake flow. Expect an additional 3–5 hp.
  • ECU tuning: For Skunk2-style big-tube headers, a tune is nearly mandatory. A simple chip tune by a reputable shop can yield 5–10 extra hp over a header-only setup.

Frequently Asked Questions

Do I need to retune my Integra after installing headers?
Not strictly for a mild 4-2-1 header on a stock engine, but you will leave power on the table. Tuning is highly recommended for any header with primaries over 1.5 inches.

Will headers pass emissions?
Only headers with a CARB EO number (like some DC Sports models) are legal in California and states that follow CARB rules. Elsewhere, you must retain a working catalytic converter.

Will headers void my warranty?
On a 25+ year old car, the factory warranty is long gone. Private aftermarket warranties may not cover header-related damage.

Can I install headers myself?
Yes, if you have basic tools, jack stands, and patience. Rusty bolts are the biggest challenge.

Conclusion

Upgrading the exhaust headers on your Acura Integra remains one of the best performance-per-dollar modifications. Brands like DC Sports, Skunk2 Racing, Megan Racing, and PLM offer proven gains of 10–15 horsepower within a $600 budget. Choose a header that matches your engine's state of tune and your driving goals — a 4-2-1 ceramic-coated street header for daily reliability, or a big-tube 4-1 race unit for track use. Pair it with a proper tune, and you'll transform the driving experience of your Integra, making every rev feel sharper and more responsive.

For further reading, check out DC Sports official site for header specifications, or browse Skunk2 Racing for detailed dyno charts. Community forums like Team Integra offer real-world installation feedback, and parts retailers such as Horsepower Freaks often have competitive pricing on these headers.