glasspack vs flowmaster
this is a comparison of the two on an '87 firebird with a 305. the flowmaster has a harmonized sound because of the dual outlet so try to keep that in mind. unfortunately im stupid and dont know the brand of glasspack nor the series of muffler.
Comp Cams Thumpr Cam With Flowmaster 80 Series
New Exhaust and front grills coming soon!**Cam Information Below**
The newest line of camshafts from Comp Cams is the "Thumpr". This line of retro-fit hydraulic roller and hydraulic flat tappet cams is designed for use in engines that originally used a flat tappet cam. It will give a significant increase in horsepower over an identical flat tappet grind. The "Thumpr" uses lobe profiles and grind characteristics that produce an early valve opening, long Exhaust duration, and a generous overlap to give the engine a powerful and hard hitting Exhaust note and a rough idle without sacrificing power output or streetability.
RPM Range: 2,000 to 5,800 rpm
Duration @ .050" lift: 227/241 (int/exh)
Valve lift: .479/.465 (int/exh)
Ideal for high performance street use, stock converter ok, best with
2000+ converter and gears, choppy, thumping idle.
Comp Cams 12-600-4
• Muscle car sound is back
• Hard hitting, lumpy idle
• Excellent throttle response and "streetability"
• Significant horsepower increase
and a stock y-pipe with no converter.
some others put into the engine too.
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