Doug Thorley Single exit exhuast and SILA cold air intake - 451 smart fortwo 2010-09-07T05:20:02Z http://www.451s.com/forum/topics/doug-thorley-single-exit?feed=yes&xn_auth=no $410, the intake was $150 and… tag:www.451s.com,2010-05-13:1912846:Comment:79267 2010-05-13T02:51:34.799Z Diljeet http://www.451s.com/profile/Diljeet $410, the intake was $150 and the exhaust was $260. The exhaust is low because i bought it from anothr Smart owner that thought it was too loud. I installed both items myself, so no labor charges. $410, the intake was $150 and the exhaust was $260. The exhaust is low because i bought it from anothr Smart owner that thought it was too loud. I installed both items myself, so no labor charges. What was the total cost ? tag:www.451s.com,2010-05-10:1912846:Comment:78949 2010-05-10T18:18:47.816Z Denis C. http://www.451s.com/profile/DenisC What was the total cost ? What was the total cost ? Our first tank of fuel return… tag:www.451s.com,2010-04-16:1912846:Comment:76791 2010-04-16T03:08:45.385Z Diljeet http://www.451s.com/profile/Diljeet Our first tank of fuel returned 43 mpg after these two mods. I think this is great considering how much we were testing our new mods. I will try to drive the next tank more conservatively and report back. Our first tank of fuel returned 43 mpg after these two mods. I think this is great considering how much we were testing our new mods. I will try to drive the next tank more conservatively and report back. Glad to hear you like the imp… tag:www.451s.com,2010-04-08:1912846:Comment:76128 2010-04-08T14:36:53.018Z SMART MADNESS http://www.451s.com/profile/SmartMadness Glad to hear you like the improvements! Glad to hear you like the improvements!