When choosing the headers to complement our ECU upgrade and supercharger for our shop Lexus IS-F, and then our RCF and GSF cars, we selected the best headers available on the market -- and we decided it is even more true for the LC500 equal length headers.
The PPE LC500 Equal Length Headers make a significant increase in flow compared to the stock manifolds. Tube lengths and diameters are increased coming together into a ported 4-1 parallel merge collector. Completely TIG welded construction with thick 16 gauge tubing for long lasting power gains.
Although RR Racing has not measured power gains of equal length versus unequal length headers on the RCF, equal length headers have the following technical advantages over unequal length:
An equal length header will expel gases at an equal rate per pulse, with gas from each cylinder leaving the header at the same time. With an unequal length header, gas from the two longer runners will remain in the header as it will take longer to reach the collector -- this results in lower cylinder temperature on an equal length header, which can help prevent ringland failure. Another benefit of equal length headers is the balance of backpressure at the exhaust ports, which will improve volumetric efficiency and overall top end performance.
According to our estimates, PPE headers can make between 30 to 40 (38 to 45 with our tune) additional wheel horsepower compared to OEM manifolds with removed catalysts (based on RR Racing Dyno tests). Please refer to our ECU upgrade tune product for recent estimates.
The headers include new Lexus 60mm outlet gaskets and a dipstick relocation bracket.
- Comes with optional RR Racing ECU Upgrade Tune package for increase power gain
- 3/8" thick head and outlet flanges
- Equal length runners
- Mandrel bent Stainless Steel 16 gauge tubing
- 15 degree parallel merge collectors
- Runners are TIG welded with Silicabronze at the head flange
- Porting at flanges
- Flat sanded head flanges
- Includes factory style outlet gaskets and optional engine gaskets
- Install instructions
- 1yr warranty
- RR-Racing recommends either doing ceramic coating or using 2" wide titanium heat insulation with these headers. We also recommend keeping the heat shield to insulate the starter when the headers are installed.
Headers that are not equipped with factory catalysts and are for racing vehicles only (for vehicles not registered to be driven on the road). RR-Racing cannot ensure the applicability of manufacturer's or third-party warranties after performing this modification. Likewise, RR-Racing does not provide any warranty, written or implied, to the engine or drivetrain of your vehicle. By buying this product, you agree to the terms of this disclaimer.