#SpeedSecrets Factory rectangular port heads outflow factory cathedral port heads on a 6.0L LS. But how much power can you expect to gain from a set of PORTED cathedral port heads? Will they outperform the rectangular port heads? And just how important is intake manifold choice with a top-end upgrade? Watch the test and get answers: | Summit Racing Equipment
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44 reactions · 4 comments | Check out the video of our new Sheet Metal Intakes to suit Cathedral port (LS1/2) and Rectangle port (LS3/L98/L77) cylinder heads. A cost effective way to change the look of your engine bay and also increase performance in the top end. These are available now from your local distributor, quality retail outlet or online at https://aeroflowperformance.com/search/?q=AF6233- | Aeroflow Performance | Facebook
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