" Please a little explanation about this "
 

I want to know what ere the following parts and what benefit give in performance:

Test Pipe.

Throttle Response Cam.

Thanks

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1972 914 v6
1974 914 2180cc 916 Look
1984 944 Auto
550 spyder (replica)
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Eduardo,
Test pipe is a straight through pipe used to replace the catalytic converter for testing. A trottle cam makes you think you have more power because the trottle is opened more with less pedal mash, but when it's to the floor there is no difference.

drew1

Test pipe.

- Allows for the removal of the catalytic converter. the result is that your exhaust has a more free flowing path. This helps to reduce pressure and allows the motor to rev a bit quicker (test pipes work... check for any smog rules or laws in your area first... here in California, a test pipe is a no no)

Throttle cam

Has no direct or indirect effect on performance. It is used only to get a feeling of more performance. I does this my changing the way your motor responds to input from the gas pedal. The result is that your motor will also rev a bit quicker but it will not add any extra power.

Thanks