Q: I have a 1965 Ford F100 with a pontiac 455 motor, what would be the pros and cons of 1) straight piping the truck and 2) would I l

asked by on

I am currently doing a frame of restoration on the truck and I would like to make a custom exhaust for it since it doesn't have one at the moment. Since it is pre-1975 and I don't have to do emissions testing on it I would like to know what the pros and cons of straight piping the car and whether or not I would lose or gain HP and? or torque by doing so. I am planning to put a 2.5 inch header on it.
My car has an automatic transmission.

Running straight exhaust off of the headers will cause the engine to have no back pressure and can cause cold air to get to the valves along with excessive oxygen and can overheat the headers and valves. It is recommended to have ant least a two chamber muffler to supply a back pressure and some noise reduction without a loss of power.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have a 1965 Ford F100 with a pontiac 455 motor, what would be the pros and cons of 1) straight piping the truck and 2) would I l

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Emergency brake seized up

On a drum brake setup, the parking brake is integrated with the service brakes. If the parking brake has failed, other parts of the rear brake system will also require replacement as the same part may be used for two...

Q: Sputtering and popping with a loss of power. Most recently died and after driving cat converter was cherry red hot.

Hi there. There could be an issue with the spark plugs not firing causing excessive amounts of hydro carbons (raw fuel) to go into the exhaust system. When excessive fuel goes into the exhaust system, the catalytic converter will glow...

Q: Rattle sound from Throttle when I give it gas and then it goes away when I let off...

Hi there. Sometimes the rattling sound during acceleration is caused by a loose bracket on the exhaust system or another mechanical component. The issue could also be a small exhaust manifold leak or something entirely different. The problem with diagnosing...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...