welcome mate - i have exactly the same car in black =)
firstly exhaust - the standard exhaust system on our cars are good for up to 200hp so unless your about to spend 2k$ on your engine i wouldnt bother
the main restriction in the stock exhaust system is the exhaust manifold - so you are much better off saving for a good set of headers
most brands are around the $400-$600 mark but the best one is the Toda setup at upwards of $1000 if you can afford it
secondly intake - now this all depends on what you want from your car - the two best options here are the Fujita/Injen CAI kit or the Comptech Icebox Intake kit
the Fujita/Injen CAI kit will give you a slight gain in the top end and give that loud induction roar
the Comptech kit will give you more of an all round gain with a nice torque spike in the mid range, it will give more of that European sports car sound and is also nice and quiet off throttle
(theres also the Gruppe-M/Mugen kits which has the best points of both of the above but will cost around the $1000 mark)
another couple of things you can change without spending thousands are the engine drive pulleys - light weight pulleys will give you similar results to a light weight flywheel and a bit of power to boot
underdrive pulleys will give you the above performance gain plus a bit more power - but there is some controversy over putting too much stress on the cars electrical system by running the alternator too low
a good set of tires will make all the difference as well
adding a bigger rear swaybar will dramatically increase the handling characteristics of the CL9 - anything larger than 18/19mm will require stronger end links as well as the standard ones break once u go bigger than that
the stock K24 flywheel is quite heavy as well - changing the clutch and flywheel is a good mod to do
if you have a good mechanic and access to the parts - changing the gear ratios and final drive with K20 Type-R components is regarded as one of the best value for money mods you can do on our CL9
the usual modification route taken by us CL9 owners are:
- intake - Comptech or Fujita/Injen
- headers - Comptech or PLM
- clutch/flywheel - Exedy or Ralco RZ is what most use but the big brands do them too Spoon, Toda, etc
- pulley kit - Ralco RZ or Unorthodox Racing (light weight or underdrive)
- suspension - a good set of coilovers or strut and spring combo
- wheels/tires - an alloy from one of the later Type-R's and Bridgestone RE002's seem to be a good value for money combination
- some braces - Ultra Racing carry pretty much every brace you want for CL9
- rear swaybar - again Ultra Racing carry a nice kit for this
- brakes - Remsa Pads with T3 slotted rotors seem to be a popular choice
this is where most stop - but to keep going you would be doing the following:
(most of these mods require management ie hondata)
- RRC intake manifold (from the newer JDM civic type-r)
- Hondata intake manifold gasket
- USDM TSX intake cam - was stronger than ours
- Toda 45deg VTC - standard VTC is limited to 25deg but the engine can go up to 45
- Hondata Flashpro engine management system with TSX ECU and a tune
- good quality JDM exhaust system
from here you get really serious with either fully built n/a engine, turbo or supercharger - talking 10k$ build just for power mods
i hope this was helpful and saves you the hours of research that i did to build myself a mods list lol
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