With Truck Hood Louvers you can under-do it, but you canâ€™t over-do it!Â Heat under your hood is the mortal enemy of your engine and everyÂ component under the hood â€“ you canâ€™tÂ get â€œtoo much heatâ€ out of there! The biggerÂ the better!Â Youâ€™ll neverÂ regret it! Dollar-for-Dollar, the bestÂ improvement you can make to your truck!â„¢
1.Â Pick-up Trucks
Â A.Â Non-TurboÂ
Â 1)Â Â Â Â Â For most, Size XL (13â€ x 21â€ per panel; two panels) will be ideal.
2)Â Â Â Â Â If not severe use, can use Size L, Hi-Flow (11â€ x 17â€ per panel; two panels). Good for most Small Blocks.
3)Â Â Â Â Â Depending on hood contour, consider Size Long (7 Â½â€ x 33â€ per panel; two panels).Â These often fit on the outboard areas of the hood — especially good where the main, central hood area is limited in size due to hood shape/bulge.
4)Â Â Â Â Â For small trucks with a 4-cylinder or small six-cylinder (non-turbo), Size Med, Hi-Flow (9â€ x 14â€ per panel) are fine for regular duty.Â Size Semi-Long (7â€ x 22 per panel) also good, if limited off-roading .
Â B.Â Â Â Â Â Turbo
Â 1)Â Â Â Â Â Go as BIG as possible!Â Heat from the Turbo (surface temp can exceed 1,000Â°F!) and Interercooler is so high, get as muchÂ OUT as possible!Â We call these â€œOuterCoolerâ€â„¢ Hood Louvers, for good reason!
2)Â Â Â Â Â Â Size XL (13â€ x 21â€ per panel; two panels) are good!Â If power computer chip or in a hot climate and especially if hills, pulling a trailer, etc., Â consider Size XXL (2 panels, each 17â€ x 28â€), if these will fit.Â If hood too contoured, consider Size Long (7 Â½â€ x 33â€ ea. x 2 panels).
2.Â Large Work Trucks (e.g., 3500)
Â A.Â Â Â Â Â Size XL (13â€ x 21â€ per panel; two panels) is a good starting point.
Â B.Â Â Â Â Â If big block/turbo/pulling a trailer/hills/hot climate, try going up to Size XXL (17â€ x 28â€ per panel; two panels).Â Thereâ€™s no such thing as too-muchÂ Hood Louver area!
Â 3. Passenger/Delivery Van Hood Louvers/Motor Home Hood Louvers
A. Â Â Â These are usually limited by a short hood size.
1)Â Â Â Â Â Â If normal conditions and small-block gas engine, Size M, Hi-Flow (two panels, 9â€ x 14â€ each) will be a big help!
2)Â Â Â Â Â To solve the space problem of a shortÂ hood; consider two sets, side by side, of Size Med., Hi-Flow.Â For example, on the left side of the hood have twoÂ Left-Hand Hood Louvers.Â On the right side of the hood have two Right-Hand Hood Louvers.Â This way, with two pairs of Size Med. Hi-Flow, youâ€™re getting plentyÂ of heat evacuation.
3)Â Â Â Â Â If Turbo or Big Block, see if the Size L (11â€ x 17â€)Â or Size XL (13â€ x 21â€) will fit;Â if not, use two pairs of Size Med., Hi-Flow.
4)Â Â Â Â Â Also consider our Size Short & Wide.Â They fit short hoods and provide about the same-size open area as Size Large.
Â 4. Â Â Over-the-Road Tractor Trailers
Size XXL (17â€ x 28â€ per panel) usually fit fine.Â With long narrow hoods, you can also consider running a front Â pair of Hood Louvers (e.g., Size L) and a back pair (e.g., Size XL).Â Also, consider one or two pairs of Size Long. Also, consider any of these on the vertical sides of hoods to get out that heat!
Â 5.Â Â Â Â Giant Gravel/Quarry Trucks and Stationary Oil-Drilling Trucks
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â See #4, above