This combination of stepped, equal-length 4-2-1 manifold and 200cell HJS catalyser gives you the biggest power and torque gains whilst still being able to pass any emissions tests. The stepped design maintains a high gas-speed at the cylinder head and the hand-formed/TIG-welded 2-1 collectors reduce turbulence at these critical junctions. There are no leaky slip-joints or springs to worry about - the T4ECU doesn't take kindly to air-leaks in the manifold!
Only 2bular offer this layout for the normally-aspirated (N/A) 2ZZ-GE motor. I use different diameters of catalysers to suit the various power outputs of the Toyota motors used by Lotus. The 2ZZ-GE N/A HJS HD directional catalyser is the highest spec Euro 5/6. With a 121mm diameter, it's smaller than the 130mm diameter of the V6 supercharged installs - but it's still a BIG catalyser. ONLY 2BULAR DO THIS. Catalysers are not beneficial to power or torque and you need to pay attention to the effect on gas-flow and speed by these products.
If you have to have a catalyser fitted, the HJS factory supplies the highest quality product to all the World's supercar manufacturers. The factory ECU works very well with it and there are no CEL's.
PLEASE NOTE - I DO NOT SUPPLY THE LAMBDA SENSOR - TOO MANY BOSCH FAILURES.
LEAD TIME ON ORDER - 2 weeks.
EXPORT PRICE (No VAT charge): 1300 :00GBP