1.0Black Smoke Oyhttps://www.blacksmokeracing.com/fiPatrikhttps://www.blacksmokeracing.com/fi/posts/author/patrik/rich600338<blockquote class="wp-embedded-content" data-secret="WesTAhOLkc"><a href="https://www.blacksmokeracing.com/fi/tuning-guides/om648-om613-300-400hp/">OM648 / OM613 300-400hv</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.blacksmokeracing.com/fi/tuning-guides/om648-om613-300-400hp/embed/#?secret=WesTAhOLkc" width="600" height="338" title="”OM648 / OM613 300-400hp” — Black Smoke Ltd" data-secret="WesTAhOLkc" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.blacksmokeracing.com/wp-includes/js/wp-embed.min.js </script>Level: Easy, but requires knowledge about engines. 300-400 horsepowers on for this engine is still small numbers and the stock internals can handle it very well, as long as you get some ARP bolts for your connecting rods. 300-400hp is one step above “software–only” tuning and you will have to replace some parts. Just as...https://www.blacksmokeracing.com/wp-content/uploads/2014/04/nexteventbg.png