I have a JDM RHD integra 5 speed (k20a3)... I plan to swap in either a k20A, K20A2 or k20Z1...which ever i can get at a resonable price by summer...
which would be the easiest and best swap ?

Also I can get a stock 06 ITR full exhaust (header all the way to the pan) at a good price...should I buy this or go aftermarket.... i will change the header after the swap to maybe DCRH or BuddyClub....but what should i do with these choices...

What's the piping size of the k20a3 exhaust vs the 06 ITR exhaust vs greddy evo2 ?

 

The best and easiest swap would be K20a because your car is JDM.

If you have the money, I think a BCRH and the ITR exhaust would be the best of both worlds: quiet and powerful.

I don't know the piping diameters.

 

I got a 05 06 pipeing size is 2 3.4 pretty sure ITR the same size and as for exhaust goes i got a DCRH <<< Bad choice with Skunk 2 mega sounds very good but is very loud all depends what u want but whatever u do put the extra money out and get a BCRH i tryed to stay cheap and get the DCRH and i have to get under the car and weld it many times from it cracking ...

 

stick with the buddy club header and the itr exhaust..

 

Thanks much all......

so in essence the 06 ITR cat back exhaust is better than the aftermarket ones like greddy or any other 60mm ? I know that an exhaust mod is not going to give me more than 5-6 whp..so I do not intend to spend a lot of money there......

My money is going to go the engine swap, kpro, rbc manifold and BCRH....

Is the 02 ITR cat back the same as the 06 ITR cat back ?