I figured the devout V8 following out there might be interested in some details on why the engine offering was killed, plus some good news on the performance of the MP10 and improved Titan orders! Taken from Mack's SCR blog... From Kevin, 7/15/2010: Thank you for all the enlightening information you have provided on SCR. I'm wondering why Mack doesn't offer a ClearTech SCR-equipped EPA2010 V-8 engine? Mack Truck's legendary V-8 powerplants have been a long-time signature Mack product. Wouldn't an SCR/EGR/particulate filter combination (or SCR/EGR/DPF) combination) allow Mack to offer an EPA2010 V-8 engine? I'm a Mack man thru-and-thru, but given the positive experience I had with Scania-powered Mack R-487Ps, I've kept an eye on Scania, who recently launched a new V8 range with 500, 560, 620 and 730 horsepower ratings, with max. torque up to 2,581 ft.lb (3,500 N.m), that are designed to meet Euro-6 EEV standards (enhanced environmentally-friendly vehicle), which is very close to EPA2010. Scania's V-8 developments catch my attention because Mack Truck's legendary E-9 V-8 had a very loyal customer following (actually still has), not unlike Scania's 16.4-liter V-8, Mercedes-Benz's 15.9-liter V-8 and MAN's 16.2-liter V-8 engines sold today. Although the V-8 might be called a niche market, Scania, Benz and MAN have continued to profitably meet customer demand for V-8 powertrains while also meeting evolving emissions standards. Scania's new V-8 reaches Euro-6 and I'm confident that Benz and MAN will as well. Why doesn't Mack take advantage of its decades of V-8 engineering expertise and introduce a "pedigreed" Mack-designed EPA-2010 V-8 engine? If stricter EPA emissions standards indeed killed Mack's E-9 V-8, how have Scania, Benz and MAN been continually able to upgrade their V-8 engines to meet tightening emissions standards? I'm confident that Mack customer demand for a pedigreed V-8 powerplant both in the North American market and Australia would be very favorable. In the U.S. market, Mack would be the envy of the competition, having the market all to themselves. Hello Kevin - Since you and I have communicated about this a number of times, you know I have a BIG soft spot in my heart for this product. Ever since I was a teenager, the sound of a Mack V8 is literally music to my ears. As an adult (although some may debate that point), I had the opportunity to be the Branch Manager of Capital Mack (1991) Inc., located in Ottawa ON. The V8 was a hot seller in that area, primarily for logging and heavy equipment hauling. I remember us selling a few RD822SX models that were strictly for use in the bush. After we had done all the local work and the engine was tuned up by the best V8 man in Canada, Jean Claude Strasbourg - the ground shook when the trucks were running! That's something I'll never forget. Let's fast forward 8 years... EPA 1998, the V8 at any HP output could not meet the new emission regulation -- and it would have cost a small fortune to make it compliant. We also knew that in 2004 there would be an additional reduction in regulated tail pipe emissions. Little did we know that it would end up being 2002! So in simple business terms - we could have "electrified" the V8 and spent a fortune to meet 1998 and 2002. Based on the number of V8's sold in a good year, there was just no commercial business case to be made. I was there, I watched this, I didn't like the decision then and frankly still don't like it now. But facts can be brutally factual. Zipping ahead another 11 years (and seemingly countless emission regulations) and we launch the Mack MP-10, a 1,000 cubic inch behemoth 6 cylinder, in a new model, the Titan by Mack. To be honest, being somewhat biased toward a V8 configuration, I was not expecting too much. I was wrong. Completely wrong. This engine is a monster! It has what I call all power all the time. My opinion is one thing, but customer buy-in is what truly matters. We just got a follow up order from an old Mack customer in Quebec, for an additional dozen MP10-equipped Titans! This was after testing an one for almost a year, hauling >300,000# of logs every single load! So I can tell you without any reservation, we are not going to reintroduce the V8. I would suggest that all the tooling is gone as well. When I visit Hagerstown, I always walk by the engines on display. The V8 there has my fingerprints all over it. I hug it every visit! Kevin, my friend, that is it on the V8.