Hello, after a long time have bought me an Omega again (the fourth). Beautiful thing. 2.2 liters 144 hp as Caravan “Design Edition` year 2002. Unfortunately now the big cylinder head revision is on. Since the cracker makes the first two kilometers also noises I would like to change it with you immediately. I would like to ask you for your experience. Is there really two different crackers with and without AGR or is there only the secondary air connection which my but does not have? AGR I have What do you think of which manufacturer I should take the new Krummer? Twin Tec, LRT K 120 or with which you have had the best experiences? I thank you in advance. Greeting Uwe