Description

Japspeed Race 4-2-1 Exhaust Manifold Header De-Cat Honda Civic Type R EP3 and Integra DC5.

Changing the Exhaust manifold is one of the best modifications you can do to the Civic Type R EP3 and Integra DC5.

Japspeed 4-2-1 Manifold replaces the restrictive standard cast iron manifold and improves exhaust gas flow thanks to its stainless steel, CAD-designed construction. It also replaces the restrictive catalytic converter with a decat downpipe, resulting in much improved throttle response and dyno-proven power gains.

Features:

Constructed from T304 stainless steel
4-2-1 design (offers greater mid range gains than a 4-1 design)
2.5″ bore collector
TIG welded
Improved throttle response and gas flow
Direct bolt-on fitment to standard or aftermarket backpipe (centre section)

Please note: sold for off road and track use only (will not pass an MOT test when fitted). O2 spacer may need to be fitted to prevent engine warning light from being triggered.

Just with this alone, gains of between 4-10bhp are achievable before mapping. With supporting mods and mapping, gains of between 6-15bhp and a lot more torque are easily achieved.

 

Note For Civic EP3 Owners:

When Fitting this manifold it is advised to add engine mount inserts to stop forward and back rocking motion of engine, this will stop your manifold hitting the anti roll bar and improve flexi lifespan.

Please select the option above if you require engine mount inserts with your new header.

If you would prefer not to use engine mount inserts it is advised to run a JDM or Whiteline front anti roll bar for clearance, again you can select this option above.

Benefits of an upgraded whiteline 24MM Front anti roll bar can be viewed here.