Originally Posted by et7333
Here is why I'm asking.......The exhaust port on my head is .080 wider then the width on the header on all exhaust ports.My question do you think this is hurting performance?This car has run 10.14@131
I would think that it is hurting, i don't know how much, but with the 1 7/8 you're increasing the tube size by .125 plus you have the option of tapering the adaptors to match your cyl. head ports in case they overlap the head ports. I would think any opening smaller than the ex port would cause some turbulance instead of good flow.
JMO
Zip.