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The Terminator
Exhaust
3 inch catback
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<blockquote data-quote="tt335ci03cobra" data-source="post: 17034093" data-attributes="member: 68944"><p>I’ve ran 2.5” magnaflow catback at 900whp turbo with no issues on a 5.4 no less. I think an sc 4.6-5.0 with a 3.0 whipple will be ok at 900-1000whp without much if any restriction. The big key will be muffler design and where the x is, high flow or no cat etc. If it makes great healthy power on a 2.5” setup stick with it because ground clearance sucks with a 3” catpipe. I think you have to get something oval bent or it’ll just have to sit higher/ruin the stance like I have had to come to terms with.</p><p></p><p></p><p></p><p>Now I did 3” resonators and straight piped… But I’m on a bigger pair of turbo’s setup with 1/5/8-3” headers, 3” x pipe. On 20-30psi it jumps above 1100-1200whp so I have the 3” side for that but if I was running just pump gas or booster, 10-12psi, the 2.5” should have been fine.</p><p></p><p></p><p></p><p>I recommend at least a great resonator for any test pipe setups, it softened the car by 50% volume but cleaned it up by 200%. I didn’t want a resonator and run header back castles for a week, but it was raspy and pitchy. Put the 3” bullet resonators in and it’s like almost perfect to me now.</p><p></p><p>Turbo/sc play totally different but you gotta realize a turbo car hates exhaust restriction where an sc car just pushes that crap out regardless</p><p></p><p>Open header, dumped under the car vs through the resonators and tailpipes, I pick up less than 25whp turbo and all with high boost. </p><p></p><p>Run what sounds great, you can’t feel 5-25whp at 800whp or higher. The car will vary 50whp just with weather and engine temp conditions at that power level.</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 17034093, member: 68944"] I’ve ran 2.5” magnaflow catback at 900whp turbo with no issues on a 5.4 no less. I think an sc 4.6-5.0 with a 3.0 whipple will be ok at 900-1000whp without much if any restriction. The big key will be muffler design and where the x is, high flow or no cat etc. If it makes great healthy power on a 2.5” setup stick with it because ground clearance sucks with a 3” catpipe. I think you have to get something oval bent or it’ll just have to sit higher/ruin the stance like I have had to come to terms with. Now I did 3” resonators and straight piped… But I’m on a bigger pair of turbo’s setup with 1/5/8-3” headers, 3” x pipe. On 20-30psi it jumps above 1100-1200whp so I have the 3” side for that but if I was running just pump gas or booster, 10-12psi, the 2.5” should have been fine. I recommend at least a great resonator for any test pipe setups, it softened the car by 50% volume but cleaned it up by 200%. I didn’t want a resonator and run header back castles for a week, but it was raspy and pitchy. Put the 3” bullet resonators in and it’s like almost perfect to me now. Turbo/sc play totally different but you gotta realize a turbo car hates exhaust restriction where an sc car just pushes that crap out regardless Open header, dumped under the car vs through the resonators and tailpipes, I pick up less than 25whp turbo and all with high boost. Run what sounds great, you can’t feel 5-25whp at 800whp or higher. The car will vary 50whp just with weather and engine temp conditions at that power level. [/QUOTE]
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