Steve Baur
Former Editor, Modified Mustangs & Fords
August 1, 2006
Photos By: Dave Massey

Now That we're more than 10 years deep into the realm of modular motivation, we find ourselves a bit friendlier with the overhead cam design of the latest Mustang powerplants. This translates into more aggressive research and development of performance parts for these engines.

That being said, it's no surprise people have already torn apart the Three-Valve Mustang 4.6 to find more power. Yes, the factory has still left something for the aftermarket to discover, and Boca Raton, Florida's Blow-By Racing has found it in the form of CNC-ported cylinder heads and performance camshafts.

Looking to maximize the available horsepower, Blow-By proprietor Chris Jones started off with a heavy Stage 2 CNC-port job on the stock Three-Valve heads, and aggressive Stage 2 camshafts, the specs of which were not divulged.

This combination, along with a fully worked exhaust system and tuning, resulted in 382 rwhp and 346 lb-ft of torque as installed on the com-pany's LNR prototype Mustang. On race gas with a radical tune, BBR saw 409 hp and 361 lb-ft of torque.

BBR's Stage 1 cylinder head is in develop-ment, but we were able to test the Stage 1 camshafts with the Stage 2 cylinder heads. The Stage 2 heads for '05-'06 Mustang GTs retail for $1,699.95 and use the stock valvetrain. Stainless steel valves and upgraded springs are optional.

Stage 1 BBR camshafts are available as regrinds ($825.00) or in billet form ($999.99). For our test, we employed the reground Stage 1s.