Emissions compliance question

[VSTNG]

Thank you for that advice. Now I need opinions on the quoted price. From the cats back, replace everything (single manufacturer's '07 V6 exhaust) with the following: dual Magnaflow mufflers, dual resonators, 2 chrome tips. All joints welded. All labor and parts $650 at a Tempe performance shop. Seem right?

[BurnTire]

Thank you for that advice. Now I need opinions on the quoted price. From the cats back, replace everything (single manufacturer's '07 V6 exhaust) with the following: dual Magnaflow mufflers, dual resonators, 2 chrome tips. All joints welded. All labor and parts $650 at a Tempe performance shop. Seem right?

Sounds Resonable.

[Indy]

You may not want all the joints welded, it could cause problems in the future if you need to remove the tranny. Just a thought take it for what its worth.

[VSTNG]

OK ... and from my discussion with the performance shop, there's been no mention of an X pipe or an H pipe in this configuration. Should I be asking for that too or best left completely separate? Yes, I'm a newbie to all of this.

[BurnTire]

OK ... and from my discussion with the performance shop, there's been no mention of an X pipe or an H pipe in this configuration. Should I be asking for that too or best left completely separate? Yes, I'm a newbie to all of this.

I would recommend keeping the catalytic converters and doing the mufflers if you want a better sound.

What does the stock setup consist of?

I am not familiar with the V-6, but I believe that you have a single muffler.

What is your mid pipe like?

Does the exhaust come out of the manifolds and then merge in to 1 pipe the whole way back to the muffler?

An X or H is a true dual setup form front to back.

As far as the cats I would keep them. It will burn cleaner. Without cats you will get more fumes.

[VSTNG]

Stock '07 V6 config. is as follows: 2 headers, one each off of each side of the V6, followed by a catalytic converter on each side, then the two sides connect via a Y pipe, with a single pipe going all the way back to the single stock muffler. My question is about staying separate from headers to the 2 new mufflers or if there is a benefit to adding an x or h mid pipe between the stock catalytic converters and the 2 new Magnaflow mufflers?

[BurnTire]

Stock '07 V6 config. is as follows: 2 headers, one each off of each side of the V6, followed by a catalytic converter on each side, then the two sides connect via a Y pipe, with a single pipe going all the way back to the single stock muffler. My question is about staying separate from headers to the 2 new mufflers or if there is a benefit to adding an x or h mid pipe between the stock catalytic converters and the 2 new Magnaflow mufflers?

What is the shop planning to do in the quote you received?

This is from the flowmaster web site.

Will my late model vehicle run better if I replace the single inlet muffler with a true dual exhaust system?
Flowmaster does not recommend replacing factory single inlet exhaust systems with a "true dual" system on computer controlled vehicles. The computers in most late model vehicles will not be able to compensate with the fuel needed with an almost doubling of the exhaust flow. Flowmasters dual outlet kits will give you the look of a "true dual" system, while optimizing the vehicles performance.

Do I need to install an "H" pipe to my dual exhaust?
Flowmaster strongly recommends using an "H" pipe, commonly known as a "balance tube" on all "true dual" exhaust systems. An "H" pipe equalizes the pressures between both banks of the engine giving a broader and flatter torque curve throughout the rpm range. It also eliminates "back-rap" common on deceleration, and creates a deeper mellower tone both inside and outside of the vehicle.
Is an "X" pipe better than and "H" pipe?
Over the years, Flowmaster's testing of all types of crossovers, including "X pipes", has revealed no substantial benefits over a properly installed "H" pipe on street driven applications. However, in race applications with small cubic inch engines and /or restricted (small bore) carburetors, will respond well to the addition of X pipes, tri-y styled collectors and/or properly designed single exhaust systems.