# What are your winter mod plans? **URL:** \ **Category:** Shift518 Automotive\ **Created:** [December 5, 2009, 5:23am UTC](https://forums.speedlife.net/t/what-are-your-winter-mod-plans/248831 "2009-12-05T05:23:40Z")\ **Posts on this page:** 1\ **Showing post:** 408
**Author:** ![TurboTravis](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbotravis/32/6406_2.png) [@TurboTravis](https://forums.speedlife.net/u/TurboTravis)\ **Post date:** [December 28, 2009, 5:27pm UTC](https://forums.speedlife.net/t/what-are-your-winter-mod-plans/248831/408 "2009-12-28T17:27:00Z")
> [@NY Speed decals.](https://forums.speedlife.net/t/ny-speed-decals/2168/52): > > thanks you for your input…i thaught that 305 heads would lower compression whilest 400’s would raise it… 305 heads would raise compression, but are made for the smaller bore size-another garbage idea. --- _[View the full topic](https://forums.speedlife.net/t/what-are-your-winter-mod-plans/248831)._