Seeking info on Max .21 engine XL7.

Catalogue indicates "for on road and rally used", it 'll be for MRX4R or 966 (still waiting) mostly for club race (medium size track, 160-200ft.straight).

Or should I go with XL9TQ (extra 40% cost) ?

Additional input on Max pipe #2018 will be appreciated.

i would reccomend the XL9 TQ but if you are on a budget the XL7 will be more than enough,these engines are both for onroad perfect for your 1/8 onroad car,about pipe usse the 2018 its made and tunned for these engines for power and fuel milage.

where do you get these engines to buy in america?

RCAMERICA.COM

whats the price for the xl7? i've emailed rcamerica and i havn't gotten a response asyet.

You should use the Max Power 2018 pipe ..

List price is $449.00, street price will be less.