http://www.nissanperformancemag.com/january03/ask_sarah/
http://autospeed.drive.com.au/cms/A_2092/article.html
correct, stringent emmissions caused a swap to the low port heads with less intake cam duration.
http://autospeed.drive.com.au/cms/A_2092/article.html
correct, stringent emmissions caused a swap to the low port heads with less intake cam duration.