Originally Posted by SAM9088
Greetings! Thanks Bro for your expertise in the subject. But you did mention about some other solutions available in the Market! Could you kindly elaborate on that Buddy! Really, i see almost everybody changing their Filters to K&N and they have a big smile on their faces! They even tell me, look at the Sticker (K&N) and stuff like that! He He He. Trust me they are all Amateurs just like me! but they DO GET A CHANGE IN ENGINE SOUND!
Buddy, some guys tell me not to change the Exhaust System for a new car because it will load the Engine it seems. THEY STRICTLY FORBID changing the Exhaust System. Is it true????? Please forgive me to ask such silly questions! I am just a Rookie on this subject!
& Awaiting your earliest reply.
SAM9088 & CHRISTINA
first rule in performance tuning is:
Do not touch the car before you have done 3,000kms when it is new!
You have to make sure that all components are up to scratch. Within the period of 3,000kms weak or faulty parts usually show the signs.
The guys who tell you this are overly cautious, but obviously are lost themselves. You can do damage to the engine with the wrong exhaust, but this only happens when people bodge things very very badly.
Usually either you lose performance or end up with a boomy and/or far too loud exhaust.
As usually the rear silencers are the weakest link in the system other than the manifold with the integrated cat, I would change the back box only because of cost.
To improve the manifold it is needed to place the cat in the collector pipe, which means that the lambda sensor wires need extending or replacing by sensors with longer wires. Apart from it the manifold is the most critical part of the exhaust to be made to a high level of precision.
Regarding the air intake. I prefer Apexi over K&N. T7 is coming up with a solution soon.
Also you should then look into re-map.