KREISSIEG STAINLESS STEEL HEADER FOR PORSCHE 996 GT3 P996GT3E-02

 

KREISSIEG STAINLESS STEEL HEADER FOR PORSCHE 996 GT3 P996GT3E-02

So in short: this is a high-end stainless header/manifold from Kreissieg for the 996 GT3, built in Japan, aftermarket, performance oriented.

⚙️ Major advantages for use on a 996 GT3

Here are the key advantages you can expect from this header upgrade. 

1. Improved exhaust flow / lower restriction
   
• Stock headers/manifolds on the 996 GT3 are good, but aftermarket high-quality stainless steel ones often improve scavenging and reduce back-pressure, especially when combined with freer mid-pipes/cats/exhaust.
• Kreissieg mentions “improved engine response” in their spec. (see above)
• For a car like the 996 GT3 (naturally-aspirated 3.6L flat-6) improved flow helps with throttle response and high-RPM power.
• If you plan track use or harder driving, the upgraded header supports the performance envelope better than stock.
2. High-quality material / durability
   
• Stainless steel construction (better corrosion resistance vs mild steel) is important especially for older cars, heat‐cycling, track use.
• The fact that Kreissieg builds in Japan, with attention to detail (hand-craft system) adds to the build quality.  
• Good materials and fitment help reduce future maintenance cost (less corrosion, fewer cracks/leaks, fewer fitment issues).
3. Enhanced sound / character
   
• Kreissieg highlight “high pitch exhaust tone” as part of the spec. This adds to the “excitement” side you’re after.
• Many enthusiasts value the richer, aggressive sound tone that an upgraded header provides.
4. Brand prestige / aftermarket support
   
• Kreissieg is a recognized high‐end exhaust/ header manufacturer for exotic/ rare cars. That brings confidence and resale value.
• Good for building a performance car with a serious parts pedigree.

⚠️ Things to check / downsides / caveats

Before you commit, here are some important points to consider:

• Fitment & compatibility:
  
• Confirm the exact model year of your 996 GT3 (and code) to match the part number P996GT3E-02. These parts may have subtle differences for USA vs Japan vs Europe spec.
• Check whether the header requires modifications (e.g., to downstream piping, mid-pipe or catalytic converter compatibility).
• The Kreissieg page notes they “can NOT guarantee NO CEL… because every car has different emission spec”. 
• If you track the car, you might be fine with emissions, but for road use you need to consider legal/ regulatory compliance.
• Cost:
  
• According to the site, price for the headers (P996GT3E-02) is listed at ~ USD 3,751 (FOB Japan) on the Japanese site.  
• Shipping, import duties, installation labour will add, so cost can be significant.
• You must weigh the cost vs gain (we’ll discuss expected gain shortly).
• Installation complexity:
  
• Header install often requires removing much of the exhaust system, possibly heat shields, maybe modifying O2 sensor locations, etc.
• On a flat-6, exhaust packaging is tight; expect labour cost and downtime.
• Also you’ll want to check whether downstream components (cats, midpipes) are compatible or need upgrade.
• Emission/Legal issues:
  
• In many jurisdictions, aftermarket headers require modification to emissions and can trigger a check engine light (CEL) if O2 sensors aren’t properly calibrated. Kreissieg warns about this.
• If you ever resell the car, non‐stock exhaust components may affect compliance or warranty (though for an older car maybe less concern).
• Actual performance gain – realistic expectations:
  
• While the header may improve response and flow, the biggest gains on a highly engineered car like the 996 GT3 come when you pair it with other upgrades: high‐flow exhaust, intake, ECU tuning, etc. The header alone may yield modest gains (e.g., a few hp and better throttle feel).afake sure if possible to measure before/after (dyno, data logging) to validate the upgrade benefit.

🔍 Fitment to your “agility / excitement / maintenance cost” criteria

• Agility / raw power / cornering capability:
  
• On the 996 GT3, adding a high‐quality header like this helps the engine breathe better. Combined with other chassis upgrades it contributes to agility (less lag in throttle, better response).
• While not directly affecting cornering, when your powertrain is more responsive it complements the chassis/hands‐on feel.
• Excitement:
  
• The enhanced exhaust sound and response bring an engaging experience. The high “character” factor is strong.
• Prudent maintenance cost:
  
• Stainless steel and high build quality help on the maintenance side (less rust/corrosion).
• However, the upgrade cost is high, and potential legal/emission issues could raise maintenance budgeting (if sensors, CELs, etc).
• If installation is well done, your long‐term upkeep might be better than cheap aftermarket headers of unknown quality.
• Value for build / resale:
  
• For the niche of 996 GT3 owners or exotic‐car modifiers, Kreissieg is a recognized brand. This can positively affect the perceived build quality/resale.
• But you must realize: it’s still “one part” of a larger build. If you’re doing a full performance build, header is just one piece.

🔧 Recommendation & things to consider for your upgrade:

• Yes, this is a high‐quality part: If you’ve got a 996 GT3 (or are planning one) and want a serious header upgrade, this fits well.
• Budget accordingly: Make sure you allow for installation, potential downstream parts (exhaust, sensors), and shipping/import duties to your country.
• Check local compliance: Inspect whether emissions/inspection requirements apply for modified exhaust headers.
• Pair with supporting mods: For best results, pair with a free‐flowing mid/backs, intake, maybe ECU tuning to get full benefit. Otherwise the header alone may deliver modest gains.
• Document your build: It might be good to document before/after results (dB sound test, throttle response data, dyno numbers if possible) to show the real benefit of the part.
• Ensure fitment and other considerations:
  
• Make sure the part number (P996GT3E-02) matches your year/model (2002-2004 etc).
• See if there are any clearances, heat shield modifications, or O2 sensor issues.
• Ask the seller about warranty/ return policy (Kreissieg builds to order).
• Since lead time is 14-20 days, plan installation accordingly.

🎯 Final summary

The Kreissieg Stainless Headers (P996GT3E-02) are a premium aftermarket upgrade for the 996 GT3 that deliver improved engine response, enhanced exhaust character, and high‐quality construction. 

If you’re building the 996 GT3 with performance and excitement in mind—and you’re willing to invest—the part makes a lot of sense.

However, as with all “big ticket” aftermarket parts, the real value comes when integrated into a full build (intake, exhaust, tuning) and when you manage fitment, legal/ emissions, and installation cost carefully.

KREISSIEG STAINLESS STEEL HEADER FOR PORSCHE 996 GT3 P996GT3E-02