Porsche Boxster 987 / Cayman NHP Racing Headers "Catless"
Product Fitment :
Porsche 987.1 Boxster 2.7L/3.4L
Porsche 987.1 Cayman 2.7L/3.4L
Brand:
Warranty :
3-Year warranty against any defects.
Product Description
NHP Exhaust Racing Headers "Catless". Made of T304 thick gauge Polished Stainless Steel and Stainless Steel Flange, these are direct replacement no modifications needed. We used same concept as our 996/997 Twin Turbo headers, which means equal lenght piping that merge in a racing merge collector for the smoothest flow possible, both O2 sensor bungs are there so you can re-install the factory O2 sensors, the primary pipes are mandrel bent and have a 45mm diameter and the secondary pipe is 55mm diameter, the stock primary pipes are 41mm our headers have primary pipes that are 10% larger and flow more exhaust.
These headers are meant for racing, they are catless, no catalytic converters are present, your 987 Boxster or Cayman comes stock with 4 Catalytic Converters, two on the headers and two on the mufflers, the O2 sensors take the reading from the primary headers, when the NHP Catless headers are installed you will most probably encounter the infamous Check Engine Light indicating errors related to the catalytic converters.
When you install these headers regardless of the mufflers used meaning stock or aftermarket you will get better sounding exhaust approx 5 dB more. We have not performed baseline dyno and after dyno but we strongly believe that these headers should give you 5 to 8 HP's at the wheels.
Gaskets are included, but we suggest you re-use the original steel gaskets, we always re-use original gaskets on local installation, the’re made of steel and are rarely damaged.
Important note about exhaust setup with catless headers. Most manufacturer's of aftermarket exhaust for the 987 Boxster/Cayman delete the secondary catalytic converters from the mufflers so you get to keep the stock headers with catalytic converters, if you choose to install the NHP catless headers with an aftermarket exhaust which means that you no longer have any catalytic converter present you are reducing backpressure and this could affect the low end response but in return if such setup is used for racing and your mostly reving on the high RPM band this will be very beneficial. In other words we suggest you retain a set of cats if your car is a daily driver.
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Price $849.99 USD
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