What is the mpg hit with stage1 cams I really like my build but I would like a little more top end. This is my commuter car I drive about 550 miles a week. Almost all hwy.
Bigger exhaust would give you more top end then cams will.
On the inside my car looks like a fighter jet.
Now after taking the header off and cutting the end of the collector off and hand blending the internal part and welding on a 2.5" v-band facing up a down pipe with a flex joint and another v-band at the collector. No leaks and wow she's alive and smooth. That pacesetter header collector needs alot of work to perform as intended. The stock down pipe was 2.25