PLEASE READ BELOW BEFORE PURCHASE!!
THIS PRODUCT WILL NOT FIT RHD NC MX5'S.
WE ONLY STOCK IT FOR CLUBMANS AND OTHER CARS WHO ARE RUNNING THE NC 2.0 LF ENGINE. NO RETURN FOR REFUND IF YOU BUY IT FOR A NC!!
Please refer to GR-009C header for NC MX5 RHD
BRIAN'S NOTES ON CERAMIC COATING. Frankly, it is usually only the mild steel headers that are ceramic coated and I had always suspected that the main reason was to slow down the inevitable rust that a mild steel header will suffer over time. Since this header is already made in ALL STAINLESS STEEL, it does not need ceramic coating for rust prevention. That left the pure question of whether or not we could really find additional torque with the ceramic coating to justify the costs. After lots of testing the answer turned out to be YES, at the points on the curve where our plain stainless header gets 12hp this coated version is consistently two points stronger, with peak hp up yet another 2 more to 160 hp at the wheels compared with 158 at the wheels for regular stainless version of this header (new dyno graph below), and a consistent 3+ foot pounds of torque from mid range to redline over the regular stainless version of this header.
See our forum MX5 PRHT Project and Dyno thread for many more details on development history, pictures of prototypes, and dyno work.
MX5 MX5 Street Header features:
-Longer, equal length runners
-High-flow 5" round, 200cpi Ceramic Core Catalytic Converter
EPA and OBD2 compliant converter,
-Bolts to RoadsterSport MX5 Midpipe...or stock MX5 midpipe. Also saves weight, factory header assembly is 15.2 pounds and this RoadsterSport MX5 Street Header with converter is just 11 pounds! Converter has two year warranty (normally aspirated street cars only, NOT recommended for supercharged or track driven cars), the ceramic coating by Techline has a three year warranty, and the stainless steel structure has a LIFETIME warranty, even the flanges!
Easy Plug and Play for Manual Transmission only (a professional can install it on the automatic but that install requires re-engineering the cooling line layout and modification to the bell housing). SEE OUR FORUM INSTALLATION INSTRUCTIONS.
We have included a number of extra features into our MX5 MX5 Street Header which we believe customers will appreciate. We CNC machine the main flange to match the factory unit, including the bolt hole flange area thicknesses so that we are precisely replicating the factory fit to the head in terms of thread depth and space, etc.
Our collector outlet is 2.5 inches. Curiously, the factory outlet is ALSO 2.5 inches and then the factory exhaust chokes down after that point. For best HIGH RPM performance customers should match our header with our midpipe and exhaust so they are running 2.5 inches of flow all the way...but our header will bolt in place of the factory header and connect perfectly to the factory midpipe for better performance from idle to redline.
Note the optional extension cords below, which many find unnecessary if they release some O2 wires from the factory harness bracket (just follow the O2 cords back until you reach that bracket and this will become obvious).