My mechanic spent a day with me as we became friends. He regularly visits my Honda CRV for maintenance. We do it religiously. Good thing after all this years, I haven’t started to learn the inside of my CRV except for few things for he might be out of job.
So is bigger really better? To understand and to be able to take a side on this great debate, one must know what really happens and what purpose does the exhaust pipe serve.
Go back to the time when these cars were first manufactured. Were they manufactured by the big shot companies? Was it the diversification by train companies into cars? The answer is No. rather, small inventors and machinists who initiated the task and formed the base of main auto companies that exist even today. The Wright brothers were originally bicycle vendors and people used to make fun of their efforts to fly.
For example, suppose your catalytic converter is failing, so you drive your vehicle to your local mechanic. The manual for your make and model lists the job at two hours. Further suppose the technician is able to replace the catalytic converter recycler in one hour. Even though it’s arguably unfair, you’ll still be charged for two hours of labor. The extra billable time is pure profit for the shop.
The real power lies in Single and Twin turbo upgrades, and the options are limitless. You can either build a mild motor that puts out 450 RWHP all day long with instant boost response, or a 1000+ RWHP monster.
Yes, they have been shown to provide a 5-15rwhp gain on a BPU(TM)’d car. But to extract their potential, you must have them tuned, by a knowledgeable tuner, on a dyno. And most of the power gains will be seen on the exhaust side. I also recommend buying cam gears which feature 5-bolts.
Keep in mind not all cars have aluminum rims, and do not be dismayed if you go to sell a catalytic converter at a scrap yard, and they tell you it is an “aftermarket” one worth only about $5.00-$10.00. In any case if you read and follow these instructions you’ll understand how to buy and sell junk cars for profit.