Reply to "180s on the street – does it make sense?"

> I’m a big fan of the 180s - love the look and sound and of course they supposedly
> cures the problems with HP-rubbing small diameter collectors and mufflers.

I've dyno tested A 400+ HP 351C with Hall's 180 headers with Supertrap mufflers
against a set of GTS Pantera headers, long tube Mustang headers and a set of sprint
car headers. The 180's were about as good as the Pantera and long tubes with
Magnaflow mufflers but better than the Pantera headers with GTS mufflers. The
Pantera and Mustang headers were better than the 180's with the exhaust port plates
installed. It appears the mufflers are the most important element as the difference
between GTS and Magnaflow mufflers is 50 HP.

> how they are to live with when the car is driven often or on longer trips.

The thing that keeps me from considering them is the loss of luggage space.

> Many members have realized significant improvements simply by replacing their Ansa
> style cans with Flowmasters or other performance mufflers.

Flowmasters don't perform as well as Magnaflows and are very location sensitive.

> They can shift the powerband lower in the rev range, kill over-rev,

In my testing, they didn't shift the power band lower but progressively lowered
power as RPM increased.

> The fact that restrictive mufflers shift the powerband to a lower rev range is why
> some people say exhaust back pressure improves low rpm torque and drivability.

That myth dies hard. Higher backpressure mufflers will noticeably hurt idle and
low rpm driveability, especially with higher overlap cam.

Dan Jones