Regardless of Some others assert of a 20HP or more boost- on modified heads by yourself, this is solely extremely hard devoid of camshaft or pistons modified. Toyota has casted and machined all their 4 valve heads to extremely close and exact tolerances for Avenue (and rally) use. The large https://blacktop4age05789.blogripley.com/27286002/5-easy-facts-about-4age-blacktop-for-sale-described