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Cobra Forums
The Terminator
Engine/Tuning
Cast iron block vs. Aluminum block
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<blockquote data-quote="WDW MKR" data-source="post: 3309454" data-attributes="member: 8038"><p>Manley doesn't make the pistons in the 03/04 Cobra... Zollner does. They are OK quality. The tight PTW clearance in these engines make it worse. Manley has a new piston that MMR helped to design. It is supposed to be very nice. The old Manley pistons had problems. I have Ross blower pistons in my car. Most will tell you that CP, Diamond, MMR-spec Manely, and Ross are great options. The CP are probably the beefiest, but also heavy. The Diamond are supposed to be the quietest. It is best to stick with what your builder stands behind, so long as it is one of the quality offerings.</p><p></p><p>The Cobra come with ARP rod bolts from the factory, but they are just standard grade. You want the ARP2000 rod bolts. They are stronger. ARP makes two grades higher than the 2000-series, but they are special order and not available for all rods.</p></blockquote><p></p>
[QUOTE="WDW MKR, post: 3309454, member: 8038"] Manley doesn't make the pistons in the 03/04 Cobra... Zollner does. They are OK quality. The tight PTW clearance in these engines make it worse. Manley has a new piston that MMR helped to design. It is supposed to be very nice. The old Manley pistons had problems. I have Ross blower pistons in my car. Most will tell you that CP, Diamond, MMR-spec Manely, and Ross are great options. The CP are probably the beefiest, but also heavy. The Diamond are supposed to be the quietest. It is best to stick with what your builder stands behind, so long as it is one of the quality offerings. The Cobra come with ARP rod bolts from the factory, but they are just standard grade. You want the ARP2000 rod bolts. They are stronger. ARP makes two grades higher than the 2000-series, but they are special order and not available for all rods. [/QUOTE]
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Cast iron block vs. Aluminum block
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